Nylon is made from coal and petroleum.
42
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Indoor pollution is 10 times more toxic than outdoor pollution.
62
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
Most dust particles in your house come from dead skin.
48
Nearly 50% of the world's scientists are assigned to military projects.
71
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Sound travels fifteen times faster through steel than through air.
134