Methane emissions can be traced back to Roman times
Wednesday, October 3, 2012 - 13:30
in Earth & Climate
Emissions of the greenhouse gas methane into the atmosphere can be traced back thousands of years in the Greenland ice sheet. Using special analytical methods, researchers have determined how much methane originates from natural sources and how much is due to human activity. The results go back to Roman times and up to the present, where more than half of the emissions are now human-made.