How the Climate System Works

Globally, carbon emissions from fires were near the long-term average in 2014, but North America's emissions were 70% higher than average.

March 2011

  • The ocean is the largest solar energy collector on Earth. More than 90 percent of the warming that has happened on Earth over the past 50 years has occurred in the ocean. Not all of that heating is detectable at the surface because currents move some of the heat to deeper layers of water, where it can "hide" for years or decades.