Three fairly comparable, legal news sources, focused on the Environment are available to Scalia Law faculty, staff, and students. They provide daily updates for professionals about issues related to Environment and Energy. You can set each to be delivered to your email inbox.
Other relevant resources:
Environment Complete is an index to literature in agriculture, ecosystem ecology, energy, natural resources, marine & freshwater science, geography, pollution & waste management, environmental technology, environmental law, public policy, social impacts, urban planning, and more.
HeinOnline has the complete run of numerous environmental law journals in PDF format.
Index to Legal Periodicals and Books indexes legal periodicals and books from 1908, and provides full-text access for more recent articles.
To find potentially useful environmental databases in non-law disciplines, use the GMU Database Portal. The subject guides to Biology and Environmental Sciences seem particularly helpful.