OTTAWA -- A United Nations-sponsored report says Canada remained among the top 10 countries in the world for investment in renewable energy last year.

WASHINGTON – The United States officially submitted its emissions-cutting target to the United Nations on Tuesday morning, formalizing its commitment to reducing emissions 26 to 28 percent below 20

The United States will submit plans for slowing global warming to the United Nations early this week but most governments will miss an informal March 31 deadline, complicating work on a global clim

The world throws a lot of things away -- measured to be about 3.5 million tons of solid waste a day in 2013, a number expected to climb to 6 million tons a day by 2025. But that's nothing.

Dozens of elephants are being slaughtered at a national park in the Democratic Republic of Congo as armed militants aggressively move into the poaching business, using money from illegal ivory to b

As Africa's rhino population continues to grow more vulnerable due to poaching and increasing demand for their horns in Asian countries, one organization is taking a different approach to curb the

Unmanned aerial vehicle (UAV) technology designed by Spanish engineers will be used to fight rhino poachers in national parks in Africa.

Scientists are looking for -- and finding -- little bits of plastic in a lot of places lately: ice cores, deep sea sediments, coral reefs, crab gills, the digestive system of mussels, even German b

As California copes with a fourth straight year of drought, Gov.

What do China's "war on pollution" and campaign against corruption have in common? They've both placed China's coal and oil empires in their crosshairs, and they're firing away.

Pages