The Amazon rainforest produces more than 20% the world's oxygen supply.
182
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
More than 25% of the world's forests are in Siberia.
51
The state of Florida is bigger than England!
74
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The Caspian Sea is also classed as the world's largest lake.
52
Israel's Dead Sea is 1,312 feet below sea level.
48
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14