Half a million square miles of forest could be lost by 2030.

Several provinces in Canada want to limit greenhouse emissions, and are trying to do so even without the help of the government of Canada.

A big step in reducing antibiotic resistance: Tyson will stop feeding antibiotics to chickens by 2017.

Air pollution causes low birth weight. This has been established from statistics in Beijing, because of strenuous measures to reduce pollution during the olympics there.

The Saudi bombardment of Sana'a airport has prevented humanitarian aid flights from landing.