One cubic mile of seawater contains about 50 pounds of gold.
79
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
More than 25% of the world's forests are in Siberia.
51
Mexico City is built on top of an underground resevoir!
47
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The average ice berg weighs 20,000,000 tons!
54
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181