Opinion by

This appeal involves a challenge, successful in the court below, to the validity of a borough ordinance which seeks to regulate, within the territorial limits of the borough, the future mining of anthracite coal by the strip mine method.

Since 1950, Harris-Walsh, Inc. (Harris-Walsh), has been engaged in the removal of anthracite coal1 by strip mining within the limits of the Borough of Dickson City (Borough), Lackawanna County. On June 28, 1963, the Borough adopted an ordinance, later amended on December 17, 1963, regulating future strip mining operations within the Borough limits. In accordance with the provisions of §5 of this ordinance, the Borough, by resolution on February 10, 1964, required that Harris-Walsh furnish a bond in the amount of $80,666 on or before February 17, 1964.2

On February 18, 1964, Harris-Walsh, averring that the ordinance was “illegal, unlawful and unconstitutional” for seventeen stated reasons and that it had been advised that, if the required bond was not posted, *263the Borough would invoke the ordinance-provided criminal penalties, instituted an equity action in the Court of Common Pleas of Lackawanna County against the Borough and requested a preliminary injunction. The court preliminarily restrained the Borough from enforcing the ordinance against Harris-Walsh. Thereafter, various hearings were held and, on October 5; 1964, the court entered a decree nisi which held the. ordinance invalid and permanently enjoined the Borough from its enforcement. Thereafter, the Commonwealth of Pennsylvania was permitted to intervene.3 On March 10, 1965, the court dismissed exceptions to its decree nisi and entered a final decree from which the Borough now appeals.

Initially, we must consider whether the court below, sitting as a court of equity, had jurisdiction, to entertain this action to restrain the enforcement of this ordinance. Although none of the parties to this action question equity’s jurisdiction — in fact, the parties agree equity has jurisdiction — nevertheless, it is our duty to inquire into the existence of jurisdiction. We have recently said: “Jurisdiction can be raised at any' time, even at the appellate level and by the appellate court itself: [citing authorities]”: (Emphasis supplied) Balazick v. Dunkard-Bobtown Municipal Authority, 414 Pa. 182, 185, 199 A. 2d 430.

If at law there exists a remedy, complete and adequate in nature, equity will not assume jurisdiction; absent such a remedy, equity may act. A remedy at law may be provided under the statute or the ordinance the validity of which is attacked, but, unless such statute or ordinance provides a remedy adequate “to the task of resolving plaintiffs’ objections,” the mere existence of such remedy will not preclude the assumption *264of equitable jurisdiction: Bliss Excavating Co. v. Luzerne County, 418 Pa. 448, 451, 211 A. 2d 532.

In the case at bar, does an adequate remedy at law exist? The only section of this ordinance which might be construed as remedy-providing is §8 which provides criminal penalties4 for violation of the ordinance but such remedy, which would require subjection to a criminal prosecution, is not of such adequacy as to oust equity of jurisdiction.5 No other remedy would be available to adequately meet this challenge to the validity of the ordinance.6

By way of contrast, recently in Bliss Excavating Co. v. Luzerne County, 418 Pa. 446, supra, a group of strip mine operators instituted an. action in equity which challenged the validity of a county zoning ordinance which, inter alia, purported to regulate strip mining within the territorial limits of the county. In Bliss, both the zoning ordinance and the enabling statute provided administrative and judicial procedures sufficient to adequately determine all possible questions raised by the strip mine operators; we, therefore, held equity lacked jurisdiction to entertain that action. Unlike Bliss, the instant ordinance provides no such adequate remedy; therefore, equity does have jurisdiction7 to entertain this action.

*265Two questions the Borough presents on this appeal: (1) has the Commonwealth of Pennsylvania preempted the field of regulation of strip mining of anthracite coal so as to prohibit the enactment by the Borough of this, strip mine ordinance? (2) did the chancellor err in excluding evidence as to relative conditions relating to the backfill of stripping pits within and without the Borough?

Although the mining of anthracite coal by the strip mine method has been in p./ogress for many years, it was not until 1947 that the legislature took steps to protect the public’s interests by a regulation of such industry. In the meantime the strip mining of anthracite coal had created in the anthracite coal field in Northeastern Pennsylvania an intolerable situation. In disregard of the interests of the public, the strip mine operators scarred and defaced the region, removed the overburden from the coal and piled it in huge and unsightly refuse banks which constituted potential fire hazards, created holes, open pits and huge craters in the terrain which were left unfilled and in such condition as to constitute potentially dangerous' traps for unwary children and adults, converted vast areas of scenic beauty into unsightly and ugly surroundings and even conducted their mining operations in close proximity to the yards and homes of the public: in short, these operators created a situation which adversely affected the properties, the safety and the general welfare of the public in the area. The complete indifference of government on the state level to the creation and existence of this intolerable situation. up until 1947 is beyond understanding; even now, the condition remains but slightly alleviated.

Prior to 1947, the only legislative step taken in connection with strip mining was the passage of a statute in 1941; the purpose of that statute was to protect “the health and safety of persons employed” in stripping. *266operations in both the anthracite and bituminous coal fields; this statute did not, nor did it purport to, regulate the operation of the industry.8 On June 27, 1947, the “Anthracite Strip Mining Law” was passed (Act of June 27, 1947, P. L. 1095, §1 et seq., 52 P.S. §681.1 et seq.). Its stated purpose was as “an exercise of the police power to provide for the improvement and conservation of lands affected by the mining of anthracite coal by .the open pit or strip mining method; to prevent the combustion of such coal and the pollution of rivers and streams and improve the use and enjoyment of such lands; to preserve the value of such lands for taxation, to decrease and prevent soil erosion and aid in the protection of game and wild life; and generally to provide for the public safety, health and general welfare.” (Act of 1947, supra, §1, 52 P.S. §681.1).9

*267The 1947 statute included provisions providing for the issuance of permits to, and the filing of bonds by, strip mine operators, blasting, back-filling, fire prevention, .drainage, replanting of stripped areas and the locations of operations in relation to highways, homes and public buildings and was applicable to all strip mining operations in the anthracite coal field.

On August 13, 1963, the législature extensively revised and amended the 1947 statute and amendments thereto by a statute entitled the “Anthracite Strip Mining and Conservation Act” (Act of August 13, 1963, P. L. 781, §1 et seq., 52 P.S. §681.1 et seq.). The stated purpose of this statute was “the regulation of mim ing of anthracite coal by the open pit or strip mining method and for the conservation and improvement of lands affected directly or indirectly by such mining; requiring operators to be licensed, to pay license fees, to secure permits to engage in strip mining and to file bonds conditioned for compliance with this act; requiring backfilling of stripping pits and leveling and planting lands affected to prevent erosion and the pollution of waters and to protect public health, safety and web fare; .conferring powers and imposing duties upon thé Department of Mines and Mineral Industries; providing for appeals, and imposing penalties, and making appropriations.”

The thrust of the Borough’s contention is that, even though it has enacted legislation dealing with the regu*268lation of anthracite coal strip raining, the Commonwealth has not preempted the field to the exclusion of legislative action in such field by political subdivisions, such as the Borough. The court below held that the Commonwealth has preempted the field. The validity of that ruling must- now be determined.

In a landmark case, Western Pennsylvania Restaurant Association v. Pittsburgh, 366 Pa. 374, 380, 381, 77 A. 2d 616, this Court, speaking through Mr. Justice (later Chief Justice) Steen, enunciated the appropriate criteria for determining whether the Commonwealth, to the exclusion of its political subdivisions, has preempted by legislation the regulation of certain activities: “(1) There are statutes which expressly provide that nothing contained therein should be construed as prohibiting municipalities from adopting appropriate ordinances, not inconsistent with the provisions of the act or the rules and regulations adopted thereunder, as might be deemed necessary to promote the purpose of the legislation. On the other, hand there are statutes which expressly provide that municipal- legislation in regard to the -subject- covered by the State act is forbidden. Then there is a third class of statutes which, regulating some industry or occupation, are silent as to whether municipalities are or are not permitted to enact supplementary legislation or to impinge in any manner upon the field entered upon by the State; in such cases the question whether municipal action is permissible must be determined by an analysis of the provisions of the act itself in order to ascertain the probable intention of the legislature in that regard. It is of course self-evident that a municipal ordinance cannot be sustained to the extent that it is contradictory to, or inconsistent with, a state statute: [citing an authority]. . . . municipalities in the exercise of the police power may regulate certain occupations by imposing restrictions which are in addition to, and not *269In conflict with, statutory regulations: [citing authorities]. But if the general tenor of the statute indicates an intention on the part of the legislature that it should not he supplemented by municipal bodies, that intention must be given effect and the attempted- local legislation held invalid: [citing authorities].”10 In Department of Licenses v. Weber, 394 Pa. 466, 468, 469, 147 A. 2d 326, Mr. Justice Musmanno, speaking for this Court said.: “Of course, it is obvious that where a statute specifically declares it has planted the flag of preemption in a field, all ordinances on the subject die away as if they did not exist. It is also apparent that, even if the statute is silent on supersession, but proclaims a course of regulation and control which brooks no municipal intervention, all ordinances touching the topic of exclusive control fade away into the limbo of ‘innocuous desuetude’. However, where the Act is silent as to monopolistic domination and a municipal ordinance provides for a localized procedure which furthers the salutary scope of the Act, the ordinance is welcomed as an ally, bringing reinforcements into the field of attainment of the statute’s objectives.” Through an examination of the state’s legislation on the subject, we must seek to determine, if possible, whether the legislature has manifested an intention to preempt the field of regulation of the anthracite strip mining industry.

Section 10 of the “Anthracite Strip Mining and Conservation Act” (Act of 1963, supra, §10, 52 P.S. §681.20c) provides: “Except as herein provided,11 all coal stripping operations-coming within the provisions *270of this act shall be under the exclusive jurisdiction of the department [Department of Mines and Mineral Industries of the CommonAvealth] and shall be conducted in compliance Avith such reasonable rules and regulations as may be deemed necessary by the secretary [Secrétary of Mines and Mineral Industries of the CommonAvealth] for the health and safety of those persons engaged in the Avork. The secretary through the mine inspectors shall have the authority and poAver to enforce the provisions of this act and the rules and regulations promulgated thereunder by him.” (Emphasis supplied). The clear implication of this language in the statute is exclusive jurisdiction is vested in the Department over the totality of all coal stripping operations Avhich fall Avithin the statute, i.e., every “stripping pit located Avithin the boundaries of a mine inspection district” (Act of 1963, supra, §3, 52 P.S. §681.3) in which anthracite coal is mined or recovered “by removing the material which overlies the coal bed in its natural or previously mined condition” (Act of 1963, supra, §3, 52 P.S. §681.3).

What does the phrase “exclusive jurisdiction” commonly and ordinarily connote or mean? Almost a half-century ago, the Superior Court in Commonwealth v. Supt. House of Correction, 64 Pa. Superior Ct. 613, 623, interpreting “exclusive jurisdiction” as used in a statute, said: “Nor can there be any doubt as to the meaning the legislature intended to give to the word exclusive. In its usual and generally accepted sense, as given by lexicographers, and in the ordinary speech of the people, it means, — possessed to the exclusion of others; appertaining to the subject alone, individual, sole; to confer exclusive jurisdiction on one court deprives all other courts of such jurisdiction, whether therefore exclusive or concurrent, conferred by statute. 3, Words and Phrases, 2550; possessed and enjoyed to the exclusion of others; debarred from participation and enjoy*271ment to any other; nor including, admitting or pertaining to any other; opposed to inclusive: 17 Cyc. 871-2.” See also: The Oxford English Dictionary, (1983), Vol. III, p. 384. The word “exclusive” is of Latin derivation — “ex” meaning “out” and “claudere” meaning “to shut”. “Exclusive” precludes any idea of co-existence and its usual, ordinary and generally accepted meaning is “sole”, “undivided” and “possessed to the exclusion of others”.

Both by statute and decisional law we are required to construe words and phrases according to their common and approved usage; statutes are presumed to employ words in their popular and plain everyday sense and the popular meaning of such words must prevail unless the statute defines them otherwise or unless the context of the statute requires another meaning: Act of May 28, 1937, P. L. 1019, §33, 46 P.S. §533; Commonwealth v. McHugh, 406 Pa. 566, 569, 178 A. 2d 556; Jury Estate, 381 Pa. 169, 176, 177, 112 A. 2d 634.

It is clear that the legislature has not specifically defined the phrase “exclusive jurisdiction” in the statute. Therefore, as it must, the Borough relies upon the provisions and context of the statute as mandating the assignment to the phrase “exclusive jurisdiction” a meaning other than its usual and ordinary meaning. The Borough contends that, when the legislature employed the phrase “exclusive jurisdiction” in §10 of the statute, an examination of the statute reveals that it intended to grant an undivided and exclusive jurisdiction (a) only in respect to the rules and regulations which affect the health and the safety of workers in the industry or (b) only to administer the provisions of the 1963 statute.

The Borough would limit the exclusive jurisdiction of the state to the area of the safety of the workers in the industry by reason of what might be termed a grammatical argument. The important sentence in §10 con*272sists of two clauses: “all coal stripping operations coming within the provisions of this act shall be under the exclusive jurisdiction of the department” AND “shall be conducted in compliance with-such reasonable rules and regulations as may be deemed necessary by the secretary for the health and safety of those persons engaged in the work”. Relying on its supposition, that, the 1941 and 1959 statutes, supra, which deal with the safety of the workers in the industry might be considered to have been repealed, impliedly, by the 1963 statute; the Borough contends that the legislature wanted to remove any doubt that might arise as to the continued vitality of the 1941 and 1959 statutes and for that reason inserted into §10 of the 1963 statute the language in the second clause of the sentence. Such is the background of the Borough’s argument based on the word “and” connecting the two clauses. With that background in mind, the Borough then argues that the second clause modifies the first clause of the sentence and that such modification requires the conclusion that exclusive jurisdiction to the department and the secretary extended only in respect to the formulation and enforcement of rules aimed aLt the protection of the health and safety of workers in the industry which is the subject of the second clause. Of course, if that argument is sound, then there, is no express preemption of the field of anthracite strip mining by the Commonwealth to the exclusion of legislative action by its political subdivisions.

Neither the 1963 statute nor any prior statutes which it amends, either by title or by provisions, purports to provide measures for the protection of the workers in the industry; the whole thrust of the 1963 statute and its predecessors is the protection of the public. A reading of the provisions of these statutés makes clear beyond any question the .purpose of these statutes. Viewed in such light, it would be absurd to *273attribute to the legislature’s employment of the phrase “exclusive jurisdiction” an intention to confine such exclusive jurisdiction to a field not covered by the provisions of the statute. We cannot interpret the grant of “exclusive jurisdiction” in so limited and restricted manner; to do so would render absurd, the legislative intention.

. The Borough next contends that the phrase “exclusive jurisdiction” must be confined to the administration of the provisions of the statute and, since the Borough does not by its ordinance intend to administer the provisions of the state statute, the field in which the Borough intends to act has not been preempted; In this connection another provision of the 1963 statute must be noted. Section 10 provides, inter alia, for the creation within the Department of Mines and Mineral Industries of the Commonwealth of a new Bureau to be known as the “Bureau of Anthracite Conservation and Reclamation”. To this Bureau, §10 expressly commits the “power” and “duty” to “administer all of the laws of this Commonwealth governing and relating to the mining of anthracite coal by the open pit or strip method and, subject to the approval of the secretary, to exercise all the powers and perform all the duties by law vested in and imposed upon said secretary in relation to such open pit or strip mining”. (Emphasis supplied). Act of 1963, supra, §10, 52 P.S. §681.20b. Having spelled out by whom the provisions of the 1963 statute, as well as all other statutes dealing with anthracite strip mining, are to be administered the legislature would indeed be guilty of redundancy if it intended that the grant of exclusive jurisdiction contained in another sentence of the same section be restricted merely to the administration of the provisions of the statute. When the legislature wanted to make clear by whom the statute was to be administered it did so and no further grant of power to administer the statute was necessary.

*274... Neither argument of the. Borough has merit. The words “exclusive jurisdiction” must, be given their ordinary, plain and everyday meaning; there exists no reason to assign any other-meaning. Giving these words their plain meaning it. is clear beyond question that the legislature, by the employment of such words, intended that the Commonwealth, and only the Commonwealth, shall regulate the anthracite strip mining industry. These words, clear and plain in meaning, preclude legislative action in the same field by any political subdivision such as the Borough. The Commonwealth in. §10. of the statute has expressly preempted the field to the exclusion of the Borough and, in so ruling, the court below was correct.

In view of the conclusion reached, we need not seek whether the statute by implication has preempted the field nor whether the statute and the ordinance so com flict that the latter must fall. Moreover, we need not inquire into the .validity of the rejection by the court, below of the evidence as to backfill conditions .within and without the Borough, the second question raised on this appeal. . . -

It may not be inappropriate to note that the reason why the Borough passed this ordinance was its belief that the. Commonwealth has not acted adequately in attempting to regulate this industry and that the legislation enacted was simply a “half measure”, weak and supine. The belief of the Borough may be well founded. However, the adequacy of the legislation to cope with the problem and the wisdom or the lack thereof on the part of the legislature in framing this legislation is not for us to determine. Such questions are solely for the legislature to determine and upon, their province wé must not encroach.

Decree affirmed. Eách party to pay own costs.

*275Concurring Opinion by

I concur in and join in the opinion of-the., majority because there is no indication in the opinion that a properly enacted zoning ordinance which would prohibit strip mining in a zoned area would, not. be effective. A properly enacted zoning ordinance is not preempted by the Act