anthropogenic global warming, definition of

Often abbreviated to just AGW. This is global warming which has been caused by human activity in addition to natural global warming.

The science around this is difficult to prove, as identifying a clear indicator of the human contribution which is independent of multiple naturals causes is very hard to do in reality.

• Climatic Models incomplete - poor understanding of mid level clouds cited
  Clouds play a major role in the climate-change equation, but they are the least-understood variable in the sky, observes a Texas A&M University geoscientist, who says mid-level clouds are especially understudied.

Related Tags: global warming, climate change