by Mark Michaelsen-
"Why is there air?" - Bill Cosby
Air- It's invisible most of the time unless you live in a smoggy area like Southern California. When driven hard by high and low pressure systems, wind is turned into a destructive force you have to witness to believe. Just ask the folks who live in tornado ridden areas what the wind is capable of.
THE EARTH'S ATMOSPHERE
Earth's atmosphere is made up of various gases in a surprising thin layer that encompasses the planet yet provides an amazing amount of regulation to the little rock we call home.