The US dropped its emission of carbon dioxide by 3.8 percent last year, the second biggest drop since 1990, US Department of Energy said in a statement.
A new study suggests that deep cuts in carbon dioxide emissions are required to prevent coral reefs around the world from dying off.
Scientists have shed light on how carbon is drawn down from the surface of the Southern Ocean to the deep waters beneath.
Authorities in the Mexican capital said Monday that concerns about pollution of the air and nearby underground aquifers led them to close a municipal trash dump described as the largest in the world.
Emphasis on biofuels as an alternative to conventional fuels would increase carbon dioxide (CO2) emissions from forests by 14 percent, researchers said.
Day in Pics: 29th August
August 29, 2014
Bipasha at launch event for Delhi Half Marathon