A new study shows air pollution from Canada's oil sands could be 4 times higher than previously reported.
As rich countries have foundered, India and China have emerged as global leaders in tackling warming.
Removing carbon dioxide from the air may be the most effective way to meet the globe's ambitious climate goals.
Communities across the West will have to adapt to living with the ever-increasing threat of wildfires.
The march is not about politics. It is about not throwing away our great engine of truth.
Major oil companies, feeling pressure from low oil prices and global climate policy, are fleeing Canada's oil sands.
U.S. energy-related carbon pollution fell in 2016, part of a decade-long trend as utilities use less coal.
The Trump administration seems to be quietly embracing offshore wind power and its economic potential.
Some big American coal companies want President Trump to keep the U.S. in the Paris climate pact.
A California appeals court rejected a claim that payments required to release greenhouse gases are a tax.
Coal use in the U.S. fell 9 percent in 2016, even as the Trump administration seeks a coal industry revival.
Dozens of GOP-sponsored bills have been introduced in Congress that seek to hamstring federal climate action.
President Trump's executive order on energy calls for the removal of "burdens" to domestic energy use.
President Trump's climate order and swift federal efforts to implement it contrasted with his bungled travel ban.
Environmentalists and some states may spend years battling President Trump over his climate rule rollbacks.
President Trump signed an executive order Tuesday aiming to overturn federal climate policies.
Cities from Sydney to Oslo are setting more ambitious targets to cut climate change than their nations.
Trump's budget proposal would reduce funding for the EPA’s enforcement office by $129 million.
Trump's budget would hamper efforts abroad to slow global warming, especially by poorer countries.
The White House’s proposed budget forcefully kicks many federal climate-related energy programs to the curb.