Scientists have grown progressively more worn the potential for climate change caused by increasing at mospheric carbon dioxide levels. the world burns the fossil fuel equivalent of approximately 9.0 x 1012 kg of petroleum per year. assume that all of this fossil fuel is in the form of octane (c hs) and calculate how much co2 in kilograms is produced by world fossil fuel combustion per year. (hint: begin by writing a balanced equation for the combustion of octane.) if the atmosphere currently contains approximately 3.0 x 1015 kg of co2, how long will it take for the world's fossil fuel combustion to double the amount of atmospheric carbon dioxide?