Cut CO2 Emissions by 4% - Stop Breathing!

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By my own calculations if we all breathed half as frequently we could reduce CO2 emissions by over 1 billion tonnes per year - or around 4% of total global output (25 billion tonnes).

Carbon dioxide (CO2) is a waste product made when the body breaks down food for energy (metabolism). The kidneys and lungs regulate the levels of carbon dioxide, bicarbonate, and carbonic acid in the blood. Blood carries carbon dioxide to the lungs, where it is breathed out. According to a study by the USDA, an average person’s respiration generates approximately 450 litres (roughly 900 grams) of carbon dioxide per day. I calculate this to be 0.3285 tonnes per year per person. There are over 6.5 billion people in the world (6,557,136,735), which, if they breathed half as much (saving 0.16425 tonnes of CO2 per person per year) would save over one billion tonnes of CO2 (1,077,009,708).