Widespread tree felling in African savannas is producing at least three times as many carbon emissions as was previously thought, research suggests.

A global study lead by geographers at the University of Tartu has revealed that drained nitrogen-rich peatlands produce laughing gas, which degrades the ozone layer and warms the climate. To avoid this, swamp forests, fens and bogs need to be conserved.

A paper published this week in the journal Limnology and Oceanography Letters is the first to show that lake size and nutrients drive how much greenhouse gases are emitted globally from lakes into the atmosphere.

On any given day, 20 percent of Americans account for nearly half of U.S. diet-related greenhouse gas emissions, and high levels of beef consumption are largely responsible, according to a new study from researchers at the University of Michigan and Tulane University.