0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
The only letter not appearing on the Periodic Table is the letter "J".
180
Indoor pollution is 10 times more toxic than outdoor pollution.
62
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
No matter how cold it gets, gasoline will not freeze.
107
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A cubic yard of air weighs about 2 pounds at sea level.
31