The city of Houston, Texas is built on a swamp and is slowly sinking!
89
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Israel's Dead Sea is 1,312 feet below sea level.
48
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63