Pollak, Acting P.J.
*28*470Defendants City of Los Angeles et al.1 and real party in interest BNSF Railway Company (BNSF) appeal a judgment granting consolidated petitions by government and public interest entities2 to set aside certification of the final environmental impact report (FEIR) relating to, and approval of, the proposed construction by BNSF of a new railyard approximately four miles from the Port of Los Angeles.3 Environmental analysis of the project dates back to at least 2005. The administrative record exceeds 200,000 pages, the FEIR exceeds 5,000 pages, and the trial court's opinions dealing with the multitude of issues raised below exceed 200 pages.
Appellants challenge the trial court's conclusion that the FEIR is deficient because *29it fails to analyze the impact of rendering capacity at BNSF's existing Hobart yard in the City of Commerce, some 24 miles from the port, available to handle additional traffic, arguing that the project description in the FEIR is misleading and that the FEIR fails to adequately analyze the indirect and growth-inducing impacts of the project. Appellants also dispute the trial court's conclusions that the analysis of the project's impacts on noise, traffic, air quality and greenhouse gas emissions is inadequate. Preliminarily, appellants also contend the trial court erred in concluding that the Attorney General, who intervened in the petition filed by the City of Long Beach, was entitled to assert objections to the sufficiency of the FEIR that were not raised by any party in the administrative proceedings.
We conclude that the exhaustion requirement that generally apply to parties contesting the adequacy of an environmental impact report do not apply to the Attorney General and that the FEIR fails to adequately consider air quality impacts of the project, particularly impacts to ambient air pollutant concentrations and cumulative impacts of such pollutant concentrations. With respect to all other claimed deficiencies, we conclude that the analysis in the *471FEIR satisfies the requirements of the California Environmental Quality Act (CEQA) ( Pub. Resources Code, § 21000 et seq. ).4
Factual and Procedural History
Together, the Ports of Long Beach and Los Angeles (collectively ports) handle up to 64 percent of all oceanic shipping on the West Coast and about 35 percent of such shipping in the United States. As described in the FEIR, "The majority of goods coming into the ports arrive in shipping containers transported on container ships. Once the containers have been off-loaded from ships onto a marine terminal, they are sorted based on destination and transported out of the terminal by truck or train. Containers may be placed on trains inside the terminal (on-dock rail), they may be loaded onto truck chassis (trailers designed to hold containers) to be hauled to their final destination, or they may be loaded onto truck chassis to be drayed to a railyard outside the terminal (near-dock or off-dock rail)."
As of 2008, there were nine operating "on-dock railyards" at the ports. "Typically, trains built on-dock consist of railcars all bound for the same destination, although exceptions do occur. Most cargo that cannot fill a single-destination train on-dock is drayed to an off-dock or near-dock railyard to be combined with cargo from other marine terminals headed for the same destination because those railyard facilities can provide space to hold containers from multiple terminals and assemble them into blocks for common destinations." "Containers handled at the on-dock railyards leave the port area via the Alameda Corridor, a 20-mile long, multiple-track rail system with no at-grade (i.e. street level) crossings that links the rail facilities of the ports with the transcontinental rail network ... near downtown Los Angeles."
Union Pacific operates the only "near-dock railyard" presently servicing the ports. Union Pacific's near-dock facility is *30approximately five miles north of the ports. Containers from the ports are transported to the near-dock railyard via trucks on local roads. Trains departing the near-dock railyard utilize the "Alameda Corridor" to connect with the transcontinental rail network.
Currently, there are two "off-dock railyards" that handle the majority of containers from the ports: BNSF's Hobart yard and Union Pacific's East Los *472Angeles yard. Both railyards are located near downtown Los Angeles, approximately 24 miles north of the ports. Containers are transported by truck, generally via the I-710 freeway, from the ports to the off-dock railyards.
In September 2005, the harbor department released a notice of preparation and initial study for BNSF's proposal to construct a 153-acre near-dock railyard approximately four miles from the ports. The proposed project is referred to as the Southern California International Gateway Project or "SCIG." On October 31, 2005, a supplemental notice of preparation was issued.
Nearly six years later, in September 2011, the harbor department released a draft environmental impact report (DEIR) for the project. Based on comments received during the public comment period, the harbor department revised major portions of the DEIR and on September 27, 2012, the harbor department released a recirculated DEIR (RDEIR) for a 45-day public review period.
On February 22, 2013, the harbor department issued the FEIR. The FEIR describes the proposed project as consisting of "the construction and operation of a new near-dock intermodal rail facility by BNSF that would handle containerized cargo transported through the ports."5 The project would have the capacity to handle an estimated 1.5 million intermodal containers per year at full operation and would generate approximately 2 million truck trips between the facility and port terminals per year.6 "The primary objective and fundamental purpose of the proposed project is to provide an additional near-dock intermodal rail facility serving the San Pedro Bay Port marine terminals that would meet current and anticipated containerized cargo demands, provide shippers with comparable intermodal options, incorporate advanced environmental controls, and help convert existing and future truck transport into rail transport, thereby providing air quality and transportation benefits." The FEIR explains, "The need for additional rail facilities to support current and expected cargo volumes, particularly intermodal container cargo was identified in several recent studies. As discussed in those *473studies, even after maximizing the potential on-dock rail yards, the demand for intermodal rail service creates a shortfall in railyard capacity. Those studies specifically identified a need for additional near-dock intermodal capacity to complement and supplement existing, planned, and potential on-dock facilities." *31At present, BNSF processes intermodal, transloaded and domestic cargo at the Hobart yard. The FEIR indicates that upon completion of the new railyard, BNSF intends to transfer 95 percent of its intermodal business at Hobart to SCIG. "The proposed project would eliminate a portion ... of existing and future intermodal truck trips between the ports and [Hobart] ... by diverting them to the proposed SCIG facility." Stated differently, the estimated 2 million truck trips between the port and the proposed new railyard "would replace truck trips that would otherwise go to the [Hobart] yard in East Los Angeles, a journey of 24 miles each way."
BNSF's domestic and transloaded cargo business will remain at the Hobart yard. The FEIR does not analyze the level of activity that will remain at Hobart upon construction of the new railyard or the impact of additional traffic that may then be handled at Hobart. The document explains, "Whether or not SCIG is built, domestic traffic (i.e., traffic from non-Port sources) and transloaded cargos to Hobart will likely continue to grow at a rate related to market demand in the United States economy. ... Because that growth is not dependent on SCIG being built, it is not appropriate to evaluate that growth as part of SCIG, or any truck trips not going to SCIG."
The FEIR concludes that the project would have significant unavoidable environmental impacts on, among other things, air quality, noise, greenhouse gas emissions and traffic.
On March 7, 2013, the board of harbor commissioners certified the FEIR, adopted a statement of overriding considerations, and approved the project. The resolution was appealed to the Los Angeles City Council which, on May 8, 2013, affirmed the certification and approval.
In June 2013, seven petitions for writs of mandate were filed in the Los Angeles County Superior Court, challenging the certification and approval. The petitions were consolidated for all purposes and later transferred to the Contra Costa County Superior Court. In May 2014, pursuant to a stipulation, the Attorney General intervened in the action filed by the City of Long Beach.
On March 30, 2016, the trial court issued its opinion and order on the consolidated petitions. The court found the FEIR's project description and *474analysis of indirect impacts and growth-inducing impacts to be deficient because they fail to discuss the reasonably foreseeable indirect impacts from freeing capacity at the existing Hobart yard. The court also held that the FEIR's analysis of noise, traffic, air quality, greenhouse gases and cumulative environmental impacts and of mitigation measures are inadequate. Thereafter, the court issued a peremptory writ of mandate directing the City of Los Angeles to set aside its certification of the FEIR and approval of the project and to comply with CEQA.
The City of Los Angeles and BNSF timely filed notices of appeal in the consolidated proceedings.
Discussion
1. Standard of Review
"In reviewing compliance with CEQA, we review the agency's action, not the trial court's decision. [Citation.] In doing so, our 'inquiry "shall extend only to whether there was a prejudicial abuse of discretion." [Citation.]' [Citation.] Abuse of discretion is established 'if the agency has not proceeded in a manner required by law or if the determination or decision is not supported by substantial evidence.' [Citation.] Substantial evidence in this context means 'enough relevant information and *32reasonable inferences from this information that a fair argument can be made to support a conclusion, even though other conclusions might also be reached.' " ( Communities for a Better Environment v. City of Richmond (2010) 184 Cal.App.4th 70, 80, 108 Cal.Rptr.3d 478.)
2. Exhaustion of Administrative Remedies
" 'Exhaustion of administrative remedies is a jurisdictional prerequisite to maintenance of a CEQA action.' [Citation.] Subdivision (a) of CEQA section 21177 sets forth the exhaustion requirement here. That requirement is satisfied if 'the alleged grounds for noncompliance with [CEQA] were presented ... by any person during the public comment period provided by [CEQA] or prior to the close of the public hearing on the project before the issuance of the notice of determination.' " ( State Water Resources Control Bd. Cases (2006) 136 Cal.App.4th 674, 791-792, 39 Cal.Rptr.3d 189, fn. & italics omitted.) " 'The rationale for exhaustion is that the agency " 'is entitled to learn the contentions of interested parties before litigation is instituted. If [plaintiffs] have previously sought administrative relief ... the [agency] will have had its opportunity to act and to render litigation unnecessary, if it had chosen to do so.' " [Citation.]' [Citations.] [¶] To advance the exhaustion doctrine's purpose '[t]he "exact issue" must have *475been presented to the administrative agency. ...' [Citation.] While ' "less specificity is required to preserve an issue for appeal in an administrative proceeding than in a judicial proceeding" ... 'generalized environmental comments at public hearings,' 'relatively ... bland and general references to environmental matters' [citation], or 'isolated and unelaborated comment[s]' [citation] will not suffice. The same is true for ' "[g]eneral objections to project approval. ..." [Citations.]' [Citation.] ' "[T]he objections must be sufficiently specific so that the agency has the opportunity to evaluate and respond to them." ' '' ( Sierra Club v. City of Orange (2008) 163 Cal.App.4th 523, 535-536, 78 Cal.Rptr.3d 1.) "An appellate court employs a de novo standard of review when determining whether the exhaustion of administrative remedies doctrine applies." ( Id . at p. 536, 78 Cal.Rptr.3d 1.)
Appellants contend the court lacked jurisdiction to consider certain objections to the sufficiency of the FEIR asserted by the Attorney General because those objections were not made by any party in the administrative proceedings.7 The Attorney General argues that he is exempt from the exhaustion requirement under section 21177, subdivision (d).8
*33( Maintain Our Desert Environment v. Town of Apple Valley (2004) 124 Cal.App.4th 430, 433, 15 Cal.Rptr.3d 322 [Under section 21177, subdivision (d), "the Attorney General of California need not comply with the exhaustion of administrative remedies requirement."].) Appellants argue that the exemption in subdivision (d) applies only to identity exhaustion under subdivision (b) and not to issue exhaustion under subdivision (a); that is, that the Attorney General may assert objections that were raised by someone during the administrative proceedings, even if not by the Attorney General, but may not assert objections that no party raised during those proceedings. Excusing the Attorney General from the issue exhaustion requirement does create the possibility that an environmental impact report may be held inadequate for a deficiency that was never brought to the agency's attention and which the *476agency had no opportunity to correct. Nevertheless, we agree with the Attorney General and the court in Maintain Our Desert Environment v. Town of Apple Valley , supra , 124 Cal.App.4th 430, 15 Cal.Rptr.3d 322 that the plain language of section 21177, subdivision (d), exempts the Attorney General from all statutory exhaustion requirements.
Contrary to appellants' argument, the legislative history does not create any ambiguity in the statutory language, let alone establish with certainty that the Legislature intended subdivision (d) to exempt the Attorney General only from identity exhaustion under subdivision (b).9 To the contrary, the unqualified exemption is consistent with other statutory provisions that recognize the Attorney General's unique authority to protect the environment of the State of California. (See Gov. Code, § 12600, subd. (b) ["It is in the public interest to provide the people of the State of California through the Attorney General with adequate remedy to protect the natural resources of the State of California from pollution, impairment, or destruction."]; Gov. Code, § 12606 ["The Attorney General shall be permitted to intervene in any judicial or administrative proceeding in which facts are alleged concerning pollution or adverse environmental effects which could affect the public generally."]; § 21167.7 [requiring every person who files an action challenging the decision of a public agency on the grounds of noncompliance with CEQA to provide copies of their pleadings to the Attorney General and precluding the granting of any relief until such copies have been furnished.].)
*343. Project Description
"Under CEQA, a 'project' means 'the whole of an action , which has a potential for resulting in either a direct physical change in the environment, or a reasonably foreseeable indirect physical change in the environment. ...'
*477[Citations.] It refers to the underlying 'activity' for which approval is being sought. [Citation.] The entirety of the project must be described, and not some smaller portion of it. [Citation.] The Guidelines specify that every EIR must set forth a project description that is sufficient to allow an adequate evaluation and review of the environmental impact." ( San Joaquin Raptor Rescue Center v. County of Merced (2007) 149 Cal.App.4th 645, 654, 57 Cal.Rptr.3d 663.)
"[A] project description that gives conflicting signals to decision makers and the public about the nature and scope of the project is fundamentally inadequate and misleading. [Citation.] 'Only through an accurate view of the project may affected outsiders and public decision-makers balance the proposal's benefit against its environmental cost, consider mitigation measures, assess the advantage of terminating the proposal (i.e., the "no project" alternative), and weigh other alternatives in the balance.' " ( Citizens for a Sustainable Treasure Island v. City and County of San Francisco (2014) 227 Cal.App.4th 1036, 1052, 174 Cal.Rptr.3d 363.)
The trial court found that the project description is deficient because it fails to include "a discussion of the reasonably foreseeable indirect changes at Hobart." Appellants contend the court's holding is based on a misunderstanding of what must be included in a project description and confuses the project's description with the analysis of the project's environmental impacts. (See El Dorado County Taxpayers for Quality Growth v. County of El Dorado (2004) 122 Cal.App.4th 1591, 1598, 20 Cal.Rptr.3d 224 ["[A] project description describes the project; it does not analyze the project's environmental impacts."].) As appellants state, "the activity subject to governmental approval is 'the construction and operation of a new near-dock intermodal rail facility by BNSF that would handle containerized cargo transported through the ports of Los Angeles and Long Beach ....' That activity 'require[d] discretionary approval from [the harbor department] and, therefore, it is subject to the requirements of CEQA.' "
The project description here accurately describes the pertinent features of the construction and operation of SCIG. With respect to the project's cargo handling capacity, the FEIR "takes a conservative approach: it analyzes the capacity the project applicant (BNSF) has applied for (a maximum of 2.8 million TEUs, or 1.5 million lifts at full operation), and assumes that market factors would determine the actual demand that it serves." Respondents argue that the description of the project is misleading and inaccurate because it "defines the project as replacing-rather than increasing-existing BNSF capacity." They argue that "[r]ather than accurately characterizing the project as increasing BNSF's cargo-handling capacity by an additional 1.5 million cargo containers per year, the EIR states that SCIG will 'replace' or 'eliminate' operations from BNSF's Hobart yard." They suggest that by defining *478the project "not as creating additional capacity to handle increased cargo volumes, but as 'eliminating' existing activities at Hobart," the EIR "profoundly skews the environmental analysis."
Respondents improperly characterize the project description. The FEIR accurately states that the project will permit BNSF to divert a portion of its operations from Hobart to SCIG and also acknowledges *35that the volume of cargo serviced at Hobart will continue to grow. Neither the project description nor any part of the FEIR suggests that BNSF's total capacity will remain unchanged as a result of the project. There is nothing misleading or inaccurate about the project description. (See El Dorado County Taxpayers for Quality Growth v. County of El Dorado, supra, 122 Cal.App.4th at pp. 1597-1598, 20 Cal.Rptr.3d 224.)
San Joaquin Raptor Rescue Center v. County of Merced, supra , 149 Cal.App.4th 645, 57 Cal.Rptr.3d 663, cited by respondents, is distinguishable. That case involved an environmental impact report in connection with the issuance of a conditional use permit for the proposed expansion of an aggregate mining operation. The EIR described the project as an expansion that includes the mining of additional acreage "but is not proposed to substantially increase daily or annual production ." ( Id. at p. 650, 57 Cal.Rptr.3d 663.) However, the court found that "despite assurances to the contrary, the Project includes a substantial increase in mine production. [¶] ... By giving such conflicting signals to decision makers and the public about the nature and scope of the activity being proposed, the Project description was fundamentally inadequate and misleading." ( Id . at pp. 655-656, 57 Cal.Rptr.3d 663.) The "curtailed and inadequate characterizations of the Project were enough to mislead the public and thwart the EIR process." ( Id. at p. 656, 57 Cal.Rptr.3d 663.) "The public hearings reflect similar confusion about the level of production allowed under the Project." ( Id. at p. 657, 57 Cal.Rptr.3d 663.) As explained above, neither the project description nor any portion of the FEIR in this case indicates that BNSF's overall capacity will not be significantly increased as a result of the construction of the new railyard. The FEIR is required to evaluate any indirect environmental impact that may be caused by the project arising from increased availability of capacity at Hobart, but there is no deficiency in the manner in which the FEIR describes the SCIG project.
4. Indirect Impacts on the Hobart Yard
"In evaluating the significance of the environmental effect of a project, the lead agency shall consider ... reasonably foreseeable indirect physical changes in the environment which may be caused by the project." (CEQA Guidelines, § 15064, subd. (d).) "An indirect physical change in the environment is a physical change in the environment which is not immediately related to the project, but which is caused indirectly by the project. ..."
*479CEQA Guidelines, § 15064, subd. (d)(2).) "An indirect physical change is to be considered only if that change is a reasonably foreseeable impact which may be caused by the project. A change which is speculative or unlikely to occur is not reasonably foreseeable." (CEQA Guidelines, § 15064, subd. (d)(3).) Indirect impacts "may include growth-inducing effects and other effects related to induced changes in the pattern of land use, population density, or growth rate, and related effects on air and water and other natural systems, including ecosystems." (CEQA Guidelines, § 15358, subd. (a)(2).)
The trial court found that the FEIR's analysis of indirect impacts is deficient because it omits any discussion of the reasonably foreseeable impacts that will be caused by freeing capacity at the Hobart yard. The court observed that by constructing SCIG, BNSF will "nearly double" its capacity and the FEIR fails to analyze how "BNSF is going to utilize Hobart once additional capacity is created."
*36Master Response 3 of the FEIR was issued in response to the large number of comments raising concerns about the project's indirect impacts at the Hobart yard. The response provides in relevant part, "A number of commenters have criticized the RDEIR for not evaluating regional changes in goods movement that they posit might occur with implementation of SCIG. Their reasoning is that if SCIG absorbs the international cargo currently going to Hobart, then domestic and transload cargo will backfill the freed-up capacity .... Other commenters have criticized the RDEIR for not including future operations at Hobart (i.e., truck and train trips) in the analyses. These assertions are speculative, and not supported by facts or evidence. [¶] In fact, ... the suggestion that cargo would materialize to backfill the freed-up capacity [is] wholly unsupported by the facts."
The record reflects that at present there is no unmet demand for rail service at the Hobart yard that will give rise to additional traffic when intermodal traffic is diverted to the new railyard. As BNSF explained in its November 28, 2012 memorandum to the harbor department, "BNSF is not aware of any currently unmet demand for cargo transportation that would be generated as a result of moving direct intermodal international cargo from Hobart to SCIG. All Southern California domestic cargo requiring rail transport is already being transported by rail. There is no latent demand for rail transport that is not being served."
Master Response 3 further explained, "there is no reason to believe that cargo would somehow materialize to fill the freed-up capacity. Hobart and other intermodal facilities already accept all cargo in the region that demands rail transport and are not yet operating at capacity, meaning that there is no unserved cargo that would appear to fill freed-up capacity. This conclusion is *480reinforced by the results of analyses showing that existing railyards, while busy, are not operating at their maximum practicable capacity (MPC); for example, Hobart's current MPC is approximately 1.7 million lifts, whereas, as described above and in Appendix G4, in 2010 it handled only about one million lifts, approximately one-half of them direct international containers. BNSF has already expanded Hobart, but cargo volumes, rather than suddenly increasing, actually decreased between 2007, when the expansion was completed, and 2010 (BNSF, 2012a; BNSF, 2012b). Those volumes were driven by regional and national economic factors (i.e., the 2008 recession), not by the availability of capacity at Hobart."
Domestic and transload cargo volumes are anticipated to increase in the future, but the freed-up capacity at Hobart will not give rise to indirect environmental impacts for at least two reasons. First, as shown by table 2.2 in the FEIR, cited in the master response, "domestic and transload cargo volumes would increase whether or not SCIG is built, and ... the increases would be the same under either scenario. This is true because demand is independent of capacity-the region's economy would grow at a rate unrelated to capacity at Hobart. ... [¶] Hobart will continue to accept transload and domestic cargo with or without SCIG." The Intermodal Rail Analysis, prepared by the harbor department, appendix G4 of the FEIR, explains, "The market demand for pure domestic cargo and transload cargo is independent of a project's capacity. In the case of the SCIG project, the region's economy drives the demand for domestic and transload cargo which would grow at a rate unrelated to capacity at Hobart. A facility's capacity does not create growth in demand."
*37Second, substantial evidence supports the finding that BNSF has capacity at Hobart to meet all projected growth until at least 2035.10 Contrary to the finding of the trial court, substantial evidence supports the growth predictions used in FEIR. The FEIR predicts that by 2030 the ports will be processing 34.6 million TEUs annually. This prediction is based on a long-term forecast prepared by the Global Insight and Tioga Group in 2009. The "IHS Global Insight/Tioga" forecast is "a demand-based (i.e., unconstrained) forecast, that assumed transportation and infrastructure capacity would be available to meet the demand." The trial court acknowledged the "considerable studies done by and for the Port about the amount of [intermodal] business that will be generated by the world economy over various periods of time."
*481The FEIR assumes that domestic cargo volumes will "continue to grow at a rate of 2% per year with or without SCIG being built."11 As the trial court noted, other studies also utilize an estimated growth in domestic cargo of 2 to 3 percent annually. The 2 percent annual growth figure appears to be based on a "IHS Global Insight database" known as "TRANSEARCH" that "shows projections of cargo tonnage for domestic and international goods movement through 2040." According to this database, the domestic cargo sector in the applicable region is projected to grow at rates between 2.1 percent and 3 percent annually from 2012 to 2035. Contrary to respondents' arguments, these growth rates are not unsupported assumptions. They are reasoned predictions by experts on which the city is entitled to rely. ( Save Round Valley Alliance v. County of Inyo (2007) 157 Cal.App.4th 1437, 1467, 70 Cal.Rptr.3d 59.)
As the FEIR explains, "BNSF has already undertaken physical modifications and operational changes that have expanded the capacity of the Hobart Yard. To accommodate future increased cargo volumes at Hobart, BNSF would undertake additional operational and physical changes. ... BNSF would implement additional physical changes to the Hobart and Commerce facilities that would increase their capacity; BNSF represents that those changes could be implemented without discretionary permits. ...[12 ] The operational changes and the approved expansions would allow Hobart/Commerce to handle approximately 3 million lifts ... per year by 2035, which is approximately 1 million lifts more than its existing capacity. The Port independently undertook engineering analyses of the Hobart/Commerce Yard that confirmed BNSF's representations of the potential to expand capacity at these facilities."
In the with-SCIG (proposed project) scenario, BNSF would not have to make *38changes to its Hobart operations other than to add capacity at some point in the future when demand exceeds capacity (projected by independent analysts to occur as soon as 2023). Since BNSF already has the right to expand its Hobart facilities, the freeing of capacity at Hobart by transferring intermodal traffic to the new railyard may at most delay the point at which *482BNSF elects to expand the Hobart facilities. The expansion will not be the consequence of constructing the new railyard.
Because there is a sufficient evidentiary basis for the city's conclusion that a predicted amount of economic growth will occur with or without this project and that the project is not necessary to enable BNSF to service the projected growth at Hobart, any such growth is not an indirect impact of the SCIG project that the FEIR was required to study.
5.-6.