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While the main greenhouse gas emission from powered aircraft is CO 2, jet airliners contribute to climate change in four ways as they fly in the tropopause: [6] Carbon dioxide (CO 2) CO 2 emissions are the most significant and best understood contribution to climate change. [7] The effects of CO 2 emissions are similar regardless of altitude.
Piston-engined aircraft use leaded gasoline and those with diesel engines may use jet fuel (kerosene). [1] By 2012, all aircraft operated by the U.S. Air Force had been certified to use a 50–50 blend of kerosene and synthetic fuel derived from coal or natural gas as a way of stabilizing the cost of fuel. [2]
Jatropha oil, a non-food oil used as a biofuel, lowers CO 2 emissions by 50–80% compared to Jet-A1, a kerosene-based fuel. [9] Jatropha, used for biodiesel, can thrive on marginal land where most plants produce low yields. [10] [11] A life cycle assessment on jatropha estimated that biofuels could reduce greenhouse gas emissions by up to 85% ...
A diesel engine may be more fuel-efficient than an avgas engine. However, very few diesel aircraft engines have been certified by aviation authorities. Diesel aircraft engines are uncommon today, even though opposed-piston aviation diesel powerplants such as the Junkers Jumo 205 family had been used during the Second World War.
The main petroleum component used in blending avgas is alkylate, which is a mixture of various isooctanes. Some refineries also use reformate.All grades of avgas that meet CAN 2–3 [further explanation needed], 25-M82 [further explanation needed] have a density of 6.01 pounds per US gallon (720 g/L) at 15 °C (59 °F).
Jet engines perform in two basic ways, the combined effect of which determines how much waste they produce as a byproduct of burning fuel to do thrust work on an aircraft. [5] First is an energy conversion as burning fuel speeds up the air passing through which at the same time produces waste heat from component losses (thermal efficiency ...
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Players manage the economy and resources of the 'European Nations' as its president, while reducing emissions of CO 2 to combat climate change and managing crises. Climate Challenge is an environmental serious game, designed to give players an understanding of the science behind climate change, as well as the options available to policy makers ...