Source: Flickr - Library of Congress

by Graciela Chichilnisky Exploring the evolution of the carbon market and reducing greenhouse gas emissions.

Mountains with snow and ice

A study looks at how billions of households in the Northern Hemisphere rely on snowpacks for water.

Chinook salmon in the Clackamas River

The F.D.A. has declared the product as safe as conventional farm-raised Atlantic salmon.

AFP/Getty Images

by Michael Lerner Another mosquito-transmitted virus follows the sargassum seaweed scourge.

Getty Images

A one-year old has been cured of previously supposed incurable cancer.