These lines are derived from a report on climate change.
Scientists are agree and concerned that the burning of fossil oil adds carbon dioxide to the atmosphere, which could cause the surface temperature of the earth to rise. Atmospheric CO2 concentration has increased from 280 to 350 ppm over last century. At present rates of increase, atmospheric CO2 may double in the next 75 years compared to preindustrial levels. Concentrations of other greenhouse gases like methane, nitrous oxide and chlorofluorocarbon compounds also appear to be increasing.
Though perhaps exaggerate, these gases absorb thermal radiation which subsequently warms the earth’s atmosphere. General circulation models (GCMs) suggest that the average global temperature will increase by as much as 3 to 5Ο as atmospheric CO2 levels double. GCMs also predict an increased rate of circulation in the global hydrologic cycle, which could lead to increased precipitation. However, GCMs cannot reliably predict regional-scale precipitation change.