Relevant UK statutes range from those relating to public health and the domestic environment, through those concerned with protecting the environment from harm arising from industry to those pertaining to broader issues of climate change and energy management.
Legislation Online
If you are a member of the University of Oxford and have an Oxford single sign-on, subscription databases are the best source for legislation - especially if you are looking for the current/amended state of an act.
Legislation in print
If you are able to come to the Law Library, two print series in KZ section Halsbury's Statutes (provided you use its updating services) and Current Law Statutes Annotated provides ways to find English legislation both as originally enacted and updated (within the limits of physical publications).
EU environmental legislation is based on Articles 191 - 193 of the Treaty