20% of global greenhouse emissions are a result of tropical forest destruction. According to Google.org's blog, "emissions from forest deforestation are comparable to the emissions of all the European Union, and are greater than those of all cars, trucks, planes, ships and trains worldwide. However, deforestation has been difficult to track and quantify until now thanks to Google.org and the Carnegie Institution for Science. Their prototype called CLASlite was demonstrated at the International Climate Change Conference (COP15) in Copenhagen last Thursday on December 10, 2009.