The Clean Water Rule spells out which streams, wetlands and other water bodies receive federal protection. The Trump administration wants to repeal it, but will face high hurdles in court.
In its first environmental case post-Scalia, the Supreme Court rebuffs farm and ranching interests that opposed the EPA's multistate plan to restore Chesapeake Bay using the Clean Water Act.
A look at Scalia's decidedly negative legacy on environment reveals how important the next Supreme Court will be on environmental questions, including the EPA Clean Power Plan.
The EPA said it will regulate emissions from airplanes – the latest in a string of environmental and climate regulations Obama has used to bypass the Republican-led Congress.
The EPA is seeking to clarify the reach of the landmark Clean Water Act to cover tributaries, yet people in agriculture and homeowners worry it will lead to onerous permitting.