By 2050 a third of the people on Earth may lack a clean, secure source of water. Join National Geographic in exploring the local stories and global trends that define the world's water crisis.

BOSTON (AP) - Environmental and health advocates, including the American Lung Association, are pushing a bill that would ban the use of old construction and demolition debris in wood burning power plants.

A new report out by World Wildlife Fund and insurer Allianz warns that sea levels could rise along the U.S. coast a whopping 26 inches by 2050 as the world warms. That would place assets worth $7.4 trillion at risk along the US coast.

On the eve of the Copenhagen conference, a group of scientists has issued an update on the 2007 report of the Intergovernmental Panel on Climate Change. Their conclusions? Ice at both poles is melting faster than predicted.

While multiple agencies argue over the Columbia River system, changes are afoot in the Nisqually Delta north of Olympia. Already you can see a difference.

Melting of the Arctic sea ice due to global warming is diluting surface waters and this is endangering some species of shellfish which need minerals in the water to form their shells and skeletons, scientists have found.

Most experts agree that we are losing upwards of 80,000 acres of tropical rainforest daily ... Along with this loss and degradation, we are losing some 135 plant, animal and insect species every day--or some 50,000 species a year--as the forests fall.

At least half the planet must be protected if humanity is to survive the next century, declared conservationists at the conclusion of 9th World Wilderness Congress

Extreme weather conditions have killed tens of thousands of starfish and left them strewn across a sheltered beach. A carpet of pink and mauve echinoderms, a family of marine animals, appeared yesterday morning on Lissadell Beach in north Co Sligo.

Today, organizations across the nation are joining forces with iLoveMountains.org to send a powerful message to the Obama Administration that blasting on Coal River Mountain needs to stop now. More than 500,000 people across the country are being asked