Fossil fuels will still be the dominate energy source on the planet in 2040, a U.S. government forecast shows.
The strong El Niño in the tropical Pacific contributed to lower energy demand in the U.S. this winter.
China has long been considering an energy cap to tackle smog and greenhouse gas emissions.
Whatever the fate of the president's most sweeping climate policy, electric companies are looking beyond coal.
Climate activists have pivoted from their fight against the Keystone XL Pipeline to protesting oil and gas leasing.
Low oil prices and the loss of a contractor have forced a Utah oil sands project to slow to a near halt.
The United States and 22 other countries agree to cut airlines' emissions over the next 12 years.
The Obama administration has temporarily halted coal leasing on federal lands to address climate change.