The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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Scientists aren't sure what color dinosaurs were.
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At room temperature, the average air molecule travels at the speed of a rifle bullet.
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Balsa wood is classified as a hard wood!
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
Airports that are at higher altitudes require a longer airstrip due to lower air density.
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