4.5 pounds of sunlight strike the Earth each day.
27
Iron weighs more after it rusts.
16
One cubic foot of gold weighs more than 1,200 pounds!
78
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The average home creates more pollution than does the average car.
33
Pumice is the only rock that floats on water.
14
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44