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
One cubic mile of seawater contains about 50 pounds of gold.
79
Israel's Dead Sea is 1,312 feet below sea level.
48
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175