Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The earth is approx. 6,588,000,000,000,000,000 tons.
175
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
The sun is 330,330 times larger than the earth.
75
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
4.5 pounds of sunlight strike the Earth each day.
27