Earth Day 2009

Earth Day 2009: "

Today is Earth Day, a day set aside for awarenesss and appreciation of the Earth's environment, and our roles within it - this year marking the 40th anniversary of Earth Day. As a way to help appreciate and observe our environment, I've collected 40 images below, each a glimpse into some aspect of the world around us, how it affects and sustains us, and how we affect it. Happy Earth Day everyone. (40 photos total)

This view of Earth, featuring North, Central and South America was taken by the NASA probe called Messenger, while conducting a fly-by of our planet in order to pick up a gravity-assist boost on its way toward Mercury. (NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)

"