evidence: However, CO2 is not the only greenhouse gas that is driving global climate change. There are a number of others — methane, nitrous oxide, and trace gases such as the group of 'F-gases' — which have contributed a significant amount of warming to date. [...] Methane is a much stronger greenhouse gas than CO2 in terms of its 'warming potential'. Over a 100-year timescale, and without considering climate feedback, one tonne of methane would generate 28 times the amount of warming as one tonne of CO2.1,2,3 [...] Nitrous oxide is a much stronger greenhouse gas than CO2 in terms of its 'warming potential'. Over a 100-year timescale, and without considering climate feedback, one tonne of nitrous oxide would generate 265 times the amount of warming as one tonne of CO2.6,3