Question

Mathematical climate models include many variables, but there is 1 variable that causes the largest difference in the temperature increases predicted in the future. this variable is _______.

Answer 1

emission of greenhouse gases

Greenhouse gases are naturally present in the atmosphere in order to keep the earth warmer by trapping some of the sun's rays on earth. Greenhouse gases include water vapor, carbon dioxide, methane, nitrous oxide, ozone, chlorofluorocarbons, and hydrofluorocarbons. 

Human activities contribute to the emission of greenhouse gases in the atmosphere through fossil fuel use, industrial processes, and intensive livestock farming, among others. Emission of large amounts of greenhouse gases can increase their natural levels in the atmosphere, possibly resulting to global warming.