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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  • Yasin Akgul / AFP / Getty

    The Beginning of the Battle for Mosul

    Thousands of Iraqi and Kurdish troops, supported by the United States, France, and Britain, are now in the early stages of a massive operation to retake the Mosul, Iraq's second largest city, from ISIS militants.

  • Jim Cole / AP

    Fall Is in the Air, Part II

    One last overview of autumn

  • Hector Retamal / AFP / Getty

    A Humanitarian Crisis in Haiti After Hurricane Matthew

    The UN estimates at least 1.4 million Haitians are now in need of urgent assistance as clean water, food, and medicine are in short supply.

  • China Stringer Network / Reut / REUTERS

    Animals in the News

    It’s time once again for a look at the animal kingdom and our interactions with the countless species that share our planet.

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