One barrel of petroleum holds 42 gallons.
20
Balsa wood is classified as a hard wood!
41
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Research indicates that plants grow healthier when they are stroked.
173
Indoor pollution is 10 times more toxic than outdoor pollution.
62
