Fuel can convert its stored chemical energy into heat energy through chemical reaction (combustion). The fuels used in automobiles are mainly gasoline and diesel. With the increase of car ownership year by year, the environmental pollution caused by car emissions and the gradual shortage of oil resources can not be ignored, so various alternative fuels have been more and more widely used.
Alternative fuels for engines developed and used in China include natural gas, liquefied petroleum gas, methanol, ethanol, biomass fuel, hydrogen and dimethyl ether.
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The role of water
1, balance body temperature
After water absorbs heat, its temperature changes relatively little. Because of this extraordinary thermal solubility, water plays a vital role in helping the body regulate body temperature.
2. Maintain cells
Water is an important part of human body structure. It promotes cell metabolism, participates in maintaining the normal shape of cells and the composition of intact cell membranes, and keeps skin smooth and elastic, which plays a key role in maintaining normal cell functions. Water is closely related to our health.
Reference source; Baidu encyclopedia-fuel