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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  • Nhac Nguyen / AFP / Getty

    Buddha Day Celebrations in Photos

    Observations of Vesak, or Buddha Day, from several countries across Asia

  • Kevin Lamarque / Reuters

    Photos of the Week: Snowy Ladybug, Shattered Lance, Mexican Smog

    Engineering fashion in Beijing, a luxury houseboat for rising seas, flooding in Paraguay, the Giro d’Italia cycling race in Italy, Buddha’s-birthday observations in Taiwan, skateboarding in Los Angeles, and much more

  • adoc-photos / Corbis via Getty

    100 Years Ago in Photos: A Look Back at 1919

    Please take a moment to look back at some of the events and sights from around the world a century ago.

  • Kevin Frayer / Getty

    Photos of Huawei’s European-Themed Campus in China

    The Ox Horn research and development campus is being developed as 12 separate “towns,” with research buildings being modeled after famous castles, palaces, and more.