A cubic yard of air weighs about 2 pounds at sea level.
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Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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The average temperature at 40,000 feet above sea level is -60 F.
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The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
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A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
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Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
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