Green may be the most common color found in nature—it's everywhere from leaves, grass, and moss to snakes, butterflies, and even the northern lights. Green represents life, vitality, nature, and, of course, environmentalism.
In Wakulla Springs, Florida, performing swimmers apply lipstick underwater. The photo was originally published in the January 1944 issue of National Geographic magazine.
(For more pictures of the amazing colors of our world, buy the National Geographic book Life in Color.)