A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Most dust particles in your house are made from dead skin!
67
The bark of an older redwood tree is fireproof.
65
Diamonds can be shattered with a hammer.
-104
The average home creates more pollution than does the average car.
33
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The force of a suction cup is calculated using F=AP.
15