The Amazon rainforest produces more than 20% the world's oxygen supply.
182
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
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
Mexico City is built on top of an underground resevoir!
47
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56