One barrel of petroleum holds 42 gallons.
20
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Sound travels fifteen times faster through steel than through air.
134
Sound travels about 4 times faster in water than in air.
408
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Iron weighs more after it rusts.
68
4.5 pounds of sunlight strike the Earth each day.
27