One cubic foot of gold weighs more than 1,200 pounds!
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
4.5 pounds of sunlight strike the Earth each day.
27
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
For every gallon of sea water, you get more than a quarter pound of salt.
45