ROBINSON, J.
The issue that we must address in this appeal is whether the issuance of a comprehensive energy strategy by the defendant Department of Energy and Environmental Protection (department), pursuant to a legislative directive, and the subsequent approval of a plan to expand the use of natural gas in this state by the department and the defendant Public Utilities Regulatory Authority (authority) constituted " 'actions which may significantly affect the environment' " within the meaning of General Statutes § 22a-1c,
1
thereby triggering the requirement for written evaluation of the expansion plan's environmental impact pursuant to
General Statutes § 22a-1b (c).
2
The plaintiff, Connecticut Energy Marketers Association, brought this action against the defendants claiming that they violated the Environmental Policy Act (act), General Statutes § 22a-1 et seq., when the department issued a comprehensive energy strategy that contemplated a significant expansion of the use of natural gas in this state, and when both defendants approved a plan for such expansion, without evaluating the environmental impact of, among other things, an increase in the use of natural gas pursuant to § 22a-1b (c). The defendants filed separate motions to dismiss the plaintiff's complaint claiming that only "individual activities or a sequence of planned activities proposed to be undertaken by state departments, institutions or agencies, or funded in whole or in part by the state, which could have a major impact on the state's" environmental resources; General Statutes § 22a-1c ; constitute "actions which may significantly affect the environment" for purposes of § 22a-1b (c). Because they did not undertake any such activities, the defendants claimed, no environmental impact evaluation was required. The trial court agreed with the defendants and rendered judgment dismissing the complaint. The plaintiff claims on appeal
3
to this court that the trial court improperly determined that the defendants' activities did not constitute "actions which may significantly
affect the environment" for purposes of § 22a-1b (c). We disagree with the plaintiff, and affirm the judgment of the trial court.
The record reveals the following facts, which are undisputed or were found by the trial court, and procedural history. In 2011, the legislature enacted General Statutes § 16a-3d, which directs the Commissioner of Energy and Environmental Protection to prepare a comprehensive energy strategy for the state every three years.
4
See
Public Acts 2011, No. 11-80,
§ 51.
5
Pursuant to this directive, the department
6
issued a document entitled "2013 Comprehensive Energy Strategy for Connecticut" (comprehensive energy strategy) on February 19, 2013. As part of the comprehensive energy strategy, the department recommended a significant expansion of the use of natural gas in the state.
This proposal would require the expansion of natural gas pipeline capacity into the state, regulatory changes to enable certain customers to have their connections financed by the state's gas companies, the construction of approximately 900 miles of gas mains to provide access to consumers, and incentives for the state's gas companies to "ramp-up the required construction quickly ...."
The department also recommended that the state's gas companies submit a detailed conversion plan to the department and the authority. The department would then review the plan for consistency with the goals of the comprehensive energy strategy and the authority would assess the plan's potential impact on ratepayers. In June, 2013, the legislature enacted General Statutes § 16-19ww, adopting the department's recommendations. See Public Acts 2013, No. 13-298, § 51.
7
Thereafter, Southern Connecticut Gas Company, Connecticut Natural Gas Corporation, and Yankee Gas Services Company (local distribution companies) submitted to the defendants a Joint Natural Gas Infrastructure Expansion Plan (expansion plan). The department found the expansion plan "to be generally consistent with the [comprehensive energy strategy] goals," but recommended several modifications. The local distribution companies made the recommended modifications and resubmitted the modified expansion plan to the defendants, at which time the authority commenced a contested case to investigate the plan's impact on ratepayers pursuant to § 16-19ww (c).
8
During the
course of that proceeding, two parties submitted letters to the authority contending that the authority was required to prepare an environmental impact evaluation pursuant to § 22a-1b (c). In response, the authority issued a notice of request for written comments on that issue. The department submitted a letter to the authority contending that an environmental impact evaluation was not required because the authority was not the sponsoring agency for the proposed expansion of the natural gas distribution system, it was not funding the proposed expansion, it was not performing the proposed expansion and it would have no ownership interest in the proposed facilities. The authority issued a final decision approving the expansion plan without requiring an environmental impact evaluation.
The plaintiff, a trade association of more than 500 energy marketers who sell gasoline and heating fuel to residential and commercial customers throughout the state, then brought this action pursuant to General Statutes § 22a-16
9
in 2014 claiming
that the expansion plan would increase the amount of natural gas escaping into the atmosphere, thereby exacerbating global warming,
10
and that it would also have other negative impacts on
the state's environmental resources. The plaintiff sought a declaratory judgment that the defendants had violated the act by failing to conduct an assessment of environmental significance or to prepare an environmental impact evaluation pursuant to § 22a-1b (c). The plaintiff also sought an injunction requiring the defendants to perform those acts.
The department filed a motion to dismiss or to strike the plaintiff's complaint claiming, among other things, that the department had not undertaken any " 'actions which may significantly affect the environment,' " as that term is defined in § 22a-1c, that would require the preparation of an environmental impact evaluation pursuant to § 22a-1b (c). The authority filed a separate motion to dismiss raising the same claim. The trial court concluded that, because the defendants were merely acting pursuant to the legislative directives contained in §§ 16a-3d and 16-19ww, their conduct did not come within the definition set forth in § 22a-1c and they were not required to prepare an environmental impact evaluation. Accordingly, the trial court concluded that the plaintiff had failed to state a claim pursuant to the act and rendered judgment dismissing the complaint on the ground that it lacked subject matter jurisdiction under the doctrine of sovereign immunity.
11
This appeal followed.
The plaintiff contends that the trial court incorrectly concluded that the department's preparation of the comprehensive energy strategy and the approval of the expansion plan by both the department and the authority were not " 'actions which may significantly affect the environment' "; General Statutes § 22a-1c ; requiring an environmental impact evaluation pursuant to § 22a-1b. We disagree.
The question of whether the trial court properly dismissed the plaintiff's complaint turns on the proper interpretation of the phrase " 'actions which may significantly affect the environment' " as used in § 22a-1c, which is an issue of statutory interpretation that presents a question of law.
Fairchild Heights Residents Assn., Inc.
v.
Fairchild Heights, Inc.
,
310 Conn. 797
, 808-809,
82 A.3d 602
(2014). "[A]n agency's factual and discretionary determinations are to be accorded considerable weight by the courts.... Cases that present pure questions of law, however, invoke a broader standard of review than is ordinarily involved in deciding
whether, in light of the evidence, the agency has acted unreasonably, arbitrarily, illegally or in abuse of its discretion.... We have determined, therefore, that the traditional deference accorded to an agency's interpretation of a statutory term is unwarranted when the construction of a statute ... has not previously been subjected to judicial scrutiny [or to] ... a governmental agency's time-tested interpretation ...." (Citations omitted; internal quotation marks omitted.)
Longley
v.
State Employees Retirement Commission
,
284 Conn. 149
, 163,
931 A.2d 890
(2007). Conversely, "courts should accord deference to an agency's formally articulated interpretation of a statute when that interpretation is both time-tested and reasonable."
Id.
In the present case, the defendants make no claim that their interpretation of § 22a-1c as excluding the department's preparation of the comprehensive energy strategy and the defendants' approval of the local distribution companies' expansion plan is time-tested, and this interpretation has not previously been subject to judicial scrutiny. Accordingly, our review is plenary.
"The process of statutory interpretation involves the determination of the meaning of the statutory language as applied to the facts of the case, including the question of whether the language does so apply.... When construing a statute, [o]ur fundamental objective is to ascertain and give effect to the apparent intent of the legislature.... In other words, we seek to determine, in a reasoned manner, the meaning of the statutory language as applied to the facts of [the] case, including the question of whether the language actually does apply.... In seeking to determine that meaning, General Statutes § 1-2z directs us first to consider the text of the statute itself and its relationship to other statutes. If, after examining such text and considering such relationship, the meaning of such text is plain and unambiguous and does not yield absurd or unworkable results,
extratextual evidence of
the meaning of the statute shall not be considered." (Internal quotation marks omitted.)
Fairchild Heights Residents Assn., Inc.
v.
Fairchild Heights, Inc.
, supra,
310 Conn. at 809
,
82 A.3d 602
.
We begin our analysis with the language of the relevant statutes. Section 22a-1b (c) provides in relevant part that "[e]ach state department, institution or agency responsible for the primary recommendation or initiation of actions which may significantly affect the environment shall in the case of each such proposed action make a detailed written evaluation of its environmental impact before deciding whether to undertake or approve such action ...." Section 22a-1c provides in relevant part that, "[a]s used in sections 22a-1 to 22a-1i, inclusive, 'actions which may significantly affect the environment' means individual activities or a sequence of planned activities proposed to be undertaken by state departments, institutions or agencies, or funded in whole or in part by the state, which could have a major impact on the state's land, water, air, historic structures and landmarks as defined in section 10-410, existing housing, or other environmental resources, or could serve short term to the disadvantage of long term environmental goals...."
Thus, § 22a-1c provides that, to constitute " 'actions which may significantly affect the environment' " for purposes of § 22a-1b (c), activities must both (1) be "proposed to be undertaken by state departments, institutions or agencies, or funded in whole or in part by the state," and (2) potentially "have a major impact on the state's" environmental resources. The most natural reading of the phrase "proposed to be undertaken by an agency or agencies" is that the proposed or initiated activity that will allegedly have a major impact on the state's environment ultimately must "
be undertaken by
an agency or agencies.
"
12
(Emphasis added.) See
Royce
v.
Heneage
,
170 Conn. 387
, 392,
365 A.2d 1109
(1976) ("[t]he words of a statute should be interpreted in their natural and usual meaning"). Thus, activities that are proposed by state actors, but which are ultimately performed by private entities, do not constitute "actions which may significantly affect the environment" for purposes of § 22a-1b (c).
13
This interpretation is supported by the legislative genealogy of the act. When the legislature originally enacted the act in 1973, the legislation provided that "[a]ctions which may significantly affect the environment shall include those projects
directly undertaken by state departments, institutions or agencies
, or funded in whole or in part by the state ...." (Emphasis added.) Public Acts 1973, No. 73-562, § 3 (P.A. 73-562). The legislative history of
P.A. 73- 562 indicates that the purpose of the legislation was to "[put] our state government and [its] agencies on the same footing in responsibility as our public and private industries." 16 H.R. Proc., Pt. 14, 1973 Sess., p. 7182, remarks of Representative Harold G. Harlow.
14
Thus, the legislature believed that, when the proposed activities are to be undertaken by private entities, there would be no reason to apply the act to the activities because private entities are already held responsible for the environmental impact of their activities under other laws.
15
In 1977, the legislature amended the act by replacing the phrase "shall include those projects directly" with the phrase "are defined for the purposes of section 22a-1b as individual activities or a sequence of planned activities proposed to be ...." Public Acts 1977, No. 77-514, § 3 (P.A. 77-514). It is reasonable to conclude that the purpose of this amendment was to clarify that, if a state actor is considering whether it should undertake activities that could have a major impact on the state's environmental resources, the state actor should prepare an environmental impact evaluation
before
actually
undertaking the activities.
16
Indeed, at the same time that the legislature amended this portion of the act, it amended the portion now codified as § 22a-1b (c) to provide that state actors must prepare an environmental impact evaluation "
before
deciding whether to undertake or approve" activities that may significantly affect the environment. (Emphasis added.) P.A. 77-514, § 2 (b). Nothing in the legislative history of P.A. 77-514 suggests that the legislature's intent was to substantially change the primary purpose of the 1973 legislation by making it applicable to proposed activities that are to be undertaken by private actors. Cf.
Doe
v.
Doe
,
244 Conn. 403
, 434,
710 A.2d 1297
(1998) ( "[w]e ordinarily do
not infer a legislative intent to change [long-standing] and fundamental legislative policies without a clear indication of such an intent").
In the present case, the defendants have not proposed to undertake or to fund the activities that the plaintiff alleges will have a major impact on the state's environmental resources, namely, the construction of new gas pipelines in the state resulting in the increased discharge of methane gas into the atmosphere. Rather, these activities will be undertaken and funded by the local distribution companies, which are private entities. Accordingly, we conclude that the trial court properly granted the defendants' motions to dismiss on the ground that the requirement of an environmental impact evaluation in § 22a-1b (c) does not apply to their activities in the present case.
In support of its claim to the contrary, the plaintiff relies on § 22a-1a-1 (2) of the Regulations of Connecticut State Agencies, which defines an "action," as that word is used in General Statutes § 22a-1b (c), as an "individual activity or a sequence of planned activities
initiated or proposed
to be undertaken by an agency or agencies, or funded in whole or in part by the state." (Emphasis added.) Regs., Conn. State Agencies § 22a-1a-1 (2). The plaintiff contends that, under this regulation, an agency engages in an "action" when it initiates or proposes an activity that will be undertaken by any entity.
17
Thus, the plaintiff contends that § 22a-1a-1 (2) of the regulations, and, by extension, General Statutes § 22a-1c, should be interpreted to apply to an individual activity or a sequence of planned activities to be undertaken by any person or entity that is initiated or proposed by an agency. Because the department proposed the expansion of the use of natural gas in the state when it prepared the comprehensive energy strategy, the plaintiff argues, the local distribution companies' expansion plan was subject to the requirements of General Statutes § 22a-1b (c). We disagree. The plaintiff's interpretation would both require the insertion of words such as "to be undertaken by any person or entity" into § 22a-1a-1 (2) of the regulations and General Statutes § 22a-1c and render the existing phrase "to be undertaken" superfluous. See
Giaimo v. New Haven
,
257 Conn. 481
, 494,
778 A.2d 33
(2001) ("we may not read into clearly expressed legislation provisions which do not find expression in its words" [internal quotation marks omitted] );
Hopkins
v.
Pac
,
180 Conn. 474
, 476,
429 A.2d 952
(1980) ("[it is] well established ... that statutes must be construed, if possible, such that no
clause, sentence or word shall be superfluous, void or insignificant").
The plaintiff also relies on the language of § 22a-1a-1 (2) of the regulations providing that an "action" for purposes of General Statutes § 22a-1b (c) includes any "activity for which an agency exercises judgment or discretion as to the propriety of that action." Regs., Conn. State Agencies § 22a-1a-1 (2). Because the department exercised judgment in preparing the comprehensive energy strategy, and because both defendants exercised judgment in approving the expansion plan, the plaintiff contends, those activities were " 'action[s]' " subject to § 22a-1b (c).
18
Again,
we disagree. This portion of the regulation was intended to implement the portion of § 22a-1c providing that § 22a-1b (c) does not apply to "activities in which state agency participation is ministerial in nature, involving no exercise of discretion on the part of the state department, institution or agency."
19
General Statutes § 22a-1c. That
language provides an exemption to the portion of § 22a-1c providing that "[s]uch actions shall include but not be limited to new projects and programs of state agencies and new projects supported by state contracts and grants ...." In turn, "[s]uch actions," as used in this portion of § 22a-1c, refers back to "activities proposed to be undertaken by state departments, institutions or agencies, or funded in whole or in part by the state ...." Thus, § 22a-1a-1 (2) of the regulations applies only to activities that will be undertaken or funded by a state actor. Because the activities that the plaintiff alleges will cause major pollution will be undertaken by private parties, the defendants' activities in proposing and approving those activities do not fall within this definition regardless of whether they are discretionary or ministerial.
To the extent that the plaintiff contends that § 22a-1a-1 (2) of the regulations broadens the definition of " 'actions which may significantly affect the environment' " set forth in General Statutes § 22a-1c, we disagree. For the reasons that we have already explained, we do not believe that the language of the regulation is broader than the statute. Indeed, all of the specific examples of "actions" subject to § 22a-1b (c) set forth in § 22a-1a-1 (2) of the regulations involve actions to be undertaken or funded by state actors.
20
Citing this court's decision in
Manchester Environmental Coalition
v.
Stockton
,
184 Conn. 51
, 63,
441 A.2d 68
(1981), overruled in part on other grounds by
Waterbury
v.
Washington
,
260 Conn. 506
, 556,
800 A.2d 1102
(2002), the plaintiff also contends that we should
construe §§ 22a-1b (c) and 22a-1c consistently with the National Environmental Policy Act (NEPA),
42 U.S.C. § 4331
et seq. See
Manchester Environmental Coalition
v.
Stockton
, supra, at 63,
441 A.2d 68
(Connecticut's act was modeled on NEPA); id., at 67, 441 A.2d 68n.20 (relying on NEPA to determine standard of review of agency's determination that no environmental impact statement is required).
21
The plaintiff points out that "there is '[f]ederal action' within the meaning of [NEPA] not only when an agency proposes to build a facility itself, but also whenever an agency makes a decision which permits action by other parties which will affect the quality of the environment.
NEPA's impact statement procedure has been held to apply where a federal agency approves a lease of land to private parties, grants licenses and permits to private parties, or approves and funds state highway projects." (Footnotes omitted.)
Scientists' Institute for Public Information, Inc.
v.
Atomic Energy Commission
,
481 F.2d 1079
, 1088 (D.C. Cir. 1973). Even if we were to assume, however, that the act was generally modeled on NEPA; see footnote 21 of this opinion; there are significant differences between the two statutes. Of particular relevance here, NEPA does not define "[f]ederal actions," as that term is used in 42 U.S.C § 4332 (2)(C),
22
as "activities proposed to be undertaken by" federal actors. Compare General Statutes § 22a-1c. Rather, the implementing regulations for NEPA define "[f]ederal actions" broadly to "include new and continuing activities, including projects and programs entirely or partly financed, assisted, conducted, regulated,
or approved
by federal agencies; new or revised agency rules,
regulations, plans, policies, or procedures;
and legislative proposals
." (Emphasis added.)
40 C.F.R. § 1508.18
. We conclude, therefore, that the scope of the "[f]ederal actions" that are subject to NEPA is broader than the scope of activities by state actors that are subject to the act. If the legislature had intended for the term "actions which may significantly affect the environment" to have the same meaning under the act as the term "[f]ederal actions" has under NEPA, it easily could have expressly provided so in § 22a-1c.
The plaintiff further contends that, because the act is remedial in nature, we should construe it liberally. See
Manchester Environmental Coalition
v.
Stockton
, supra,
184 Conn. at 57
,
441 A.2d 68
("[s]tatutes such as the [Connecticut Environmental Protection Act] are remedial in nature and should be liberally construed to accomplish their purpose"). The defendants contend that, to the contrary, "[w]hen the state waives sovereign immunity by statute ... a party who wishes to sue under the legislative waiver must come clearly within its provisions because [s]tatutes in derogation of sovereignty should be strictly construed in favor of the state, so that its sovereignty may be upheld and not narrowed or destroyed." (Internal quotation marks omitted.)
Duguay
v.
Hopkins
,
191 Conn. 222
, 232,
464 A.2d 45
(1983) ; see also
White
v.
Burns
,
213 Conn. 307
, 312,
567 A.2d 1195
(1990) ("[w]here there is any doubt about their meaning or intent [statutes] are given the effect which makes the least rather than the most change in sovereign immunity"). These principles come into play, however, only when there is doubt about the meaning of the statute under review after this court has engaged in the full process of statutory interpretation. Cf.
State
v.
Courchesne
,
262 Conn. 537
, 555,
816 A.2d 562
(2003) (rules of lenient or strict construction of criminal statutes come into play only when, "after the court has engaged in the full process of statutory interpretation, there is nonetheless a reasonable doubt about [the] statute's intended scope" [internal quotation marks omitted] ). Because we have no residual doubt about the meaning of § 22a-1c, we need not determine here which of these principles applies when they are in conflict.
The judgment is affirmed.
In this opinion PALMER, ZARELLA, and McDONALD, Js., concurred.