A cubic yard of air weighs about 2 pounds at sea level.
31
One ragweed plant can release as many as one billion grains of pollen!
51
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
The bark of an older redwood tree is fireproof.
65
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
4.5 pounds of sunlight strike the Earth each day.
27
Iron weighs more after it rusts.
68