Earth Day is the largest, most celebrated environmental event worldwide. Environmental challenges surround us as our actions pollute and often harm the fragile environment that humans and wildlife depend on to survive.
Earth Day is an annual event that provides the opportunity for positive actions and results and aims to inspire awareness of and appreciation for our environment. The United Nations celebrates Earth Day each year on the vernal (March) equinox. ***A global observance in many countries is held each year on April 22.

Thursday

Earth Day 2010: a history of four decades of environmental campaigning


 Feliz Día de la Tierra

This year is the 40th anniversary of the annual Earth Day, which raises awareness about environmental issues. Here is a brief history.Stone Canyon. Petrified sand dunes and reflection, Paria Canyon - Vermilion Cliffs Wilderness, Arizona

Stone Canyon. Petrified sand dunes and reflection, Paria Canyon - Vermilion Cliffs Wilderness, Arizona Photo: Jack Dykinga
The pictures have been taken over the last 60 years all over the world and include the 1968 image of Earthrise taken from the spaceship Apollo and a portrait of the naturalist Jane Goodall being greeted by a chimpanzee.
The images will be auctioned at Christie's to raise money for the 40th annual Earth Day, to raise awareness of the fragility and beauty of the natural environment. The money raised will go towards environmental groups.
The International League of Conservation Photographers (ILCP) asked more than 100 experts and editors to submit nominations for images they considered to be “the best,” in the last 100 years of photography.
Images chosen include a black-and-white American landscape taken by the father of nature photography Ansel Adams in 1942 and underwater images of a southern right whale and a thresher shark caught in a fishing net by acclaimed sea life photographer Brian Skerry.
The 'dancing' polar bears are actually play fighting during one of the largest gatherings of the species on Earth in Hudson Bay, Canada before dispersing for the winter. The tortoises in the Galapagos Islands are one of the rarest sites in modern times, after the species was almost wiped out elsewhere. While the photographer had to wait for days by a water hole in Botswana to capture bull elephants at dusk.
Justin Black, ILCP Executive Director, said it was difficult to choose the 40 final images.
“It was no easy task, selecting just forty images from the incredible nominations submitted to us by some of the world’s greatest nature photographers, but it was a tremendous honour for the ILCP to be asked to take the lead on this challenging project," he said.
Split Rock and Cloud, Eastern Sierra, California, 1976
Split Rock and Cloud, Eastern Sierra, California, 1976 Photo: Galen Rowell/Mountain Light

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