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
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Out of all the senses, smell is most closely linked to memory.
146
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Iron weighs more after it rusts.
68
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18