The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
For every gallon of sea water, you get more than a quarter pound of salt.
45
Iron weighs more after it rusts.
16
One barrel of petroleum holds 42 gallons.
20
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Iron weighs more after it rusts.
68