Earth Day 45

First organized in 1970, Earth Day is a day set aside to remember and appreciate the Earth's environment, and our responsibilities and roles within it. On April 22 we observe the 45th annual Earth Day, and though many things have changed for the better, environmental challenges remain. In the past 45 years, the population of the Earth has doubled—75 percent of the people alive today were born after 1970—and the increased demand on our limited resources makes sustainable solutions even more important. Collected here are 45 images of our world from recent years, each a glimpse into some aspect of our environment, how it affects and sustains us, and how we affect it.

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  • Jam Sta Rosa / AFP via Getty

    Photos of the Week: Ute Muster, Snow Leopard, Highway Acrobat

    A dog exhibition in Bishkek, a Kali Uchis performance in Texas, a demon-king burning in India, attacks on Kurdish sites in Syria, unrest in Haiti, the Masham Sheep Fair in England, and much more.

  • Tomacrosse / Shutterstock

    A Photo Trip to the Bungle Bungles

    Spectacular karst sandstone formations in Western Australia’s Purnululu National Park

  • Dolores Ochoa / AP

    Anti-austerity Protests and Strikes Shut Down Quito, Ecuador

    Demonstrations have roiled Ecuador’s capital city for more than a week, after the government eliminated a long-standing subsidy, doubling the price of fuel.

  • Ilyas Akengin / AFP / Getty

    Moving an Ancient Town to Higher Ground

    Images from southeastern Turkey, where the town of Hasankeyf—continuously occupied for some 12,000 years—is being partially relocated as the old site is abandoned to a rising reservoir behind a new dam