Cumulative anthropogenic (i.e., human-emitted) emissions of CO2 from fossil fuel use are a major cause of global warming,[108] and give some indication of which countries have contributed most to human-induced climate change. In particular, CO2 stays in the atmosphere for at least 150 years, whilst methane and nitrous oxides generally disappear within a decade or so. The graph gives some indication of which regions have contributed most to human-induced climate change.[109] [110]: 15 When these numbers are calculated per capita cumulative emissions based on then-current population the situation is shown even more clearly.