Debate reignites over whether nuclear energy is an important tool or a costly mistake.
Recent Supreme Court decision misses a climate change solution that could satisfy all parties.
EPA’s authority to regulate greenhouse gas emissions is left largely intact, but agency faces rebuke.
EPA finalized new rules on sulfur in gasoline and tailpipe emissions as part of clean car program.
The last years of the Obama administration will determine if the EPA succeeds in implementing a cap-and-trade regime.
Presidential memo requires agencies to obtain 20% of energy from renewable sources by 2020.
Changes should be made to better reflect underlying scientific models.