The US helped forge the Paris agreement for international reductions in greenhouse-gas emissions. Now the election of Donald Trump is resetting the climate-diplomacy landscape, and casting a Green Climate Fund for developing nations into doubt.
Twenty percent of the fuel was convered from an organic compound made from residual wood from logging operations.
The US Army Corps of Engineers has delayed its pipeline decision to discuss the project with the Standing Rock Sioux tribe. Pipeline backers, meanwhile, are growing increasingly impatient.
A huge shelter has begun making its way to Chernobyl nuclear reactor No. 4.
The World Meteorological Organization says that 2016 is set to break the record for the hottest year globally.
An annual report projects global carbon dioxide emissions will continue to have slowed in 2016. But the lead author notes this reduction alone will not be enough to curb rising global temperatures.
These canines were trained to detect zebra and quagga mussels, invasive species which have caused ecological problems in the US since first detected in the 1980s.
Donald Trump wants to scratch climate change off the public agenda. Since so many Americans and other nations disagree, the result could be battles that make climate loom larger in the public square.
On the campaign trail, Donald Trump famously called climate change a 'hoax.' But the increasing economic viability of alternative energies, plus the ability to keep jobs at home, may prompt him to reconsider.
The president-elect has promised to 'bring the coal industry back 100 percent.' Market forces suggest differently.
Wasting less food and installing efficient lightbulbs may seem like small steps, but the avoided emissions add up. And such actions can set social norms that help guide businesses and governments.
The mitigating effects of trees and other plants cannot keep pace with the anthropogenic climate change and the total amount of CO2 in the atmosphere is still rising, but more slowly than previously thought.
Possible changes include slashing EPA regulations and opening more federal lands to fossil fuel extraction.
Negotiators from around the world, gathered in Morocco, are trying to build on last year's landmark Paris agreement to cut carbon emissions.
Donald Trump, who said he will pull out of the Paris climate deal, has several viable paths to do so, although the biggest impact on the global movement might be symbolic.