If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
One cubic mile of seawater contains about 50 pounds of gold.
79
Mexico City is built on top of an underground resevoir!
47
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