US President Barack Obama will Monday unveil what he called the "biggest, most important step we've ever taken" to fight climate change, a sensitive issue central to his legacy.
President Barack Obama plans to decide before leaving office whether to approve the controversial Keystone XL pipeline that would send Canadian crude oil to US refineries.
The EU on Monday hailed US President Barack Obama's clean power plan as "a positive step" to cut carbon emissions ahead of a global climate summit in Paris.
President Barack Obama's plan to slash electricity-generated CO2 emissions was welcomed Tuesday as a courageous step towards a lower-carbon future, but not yet enough to brake dangerous planet warming.
President Barack Obama described climate change as one of the key challenges of our time Monday as he announced the first ever limits on US power plant emissions.