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Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) including 1 billion people in more than 193 countries.
Earth Day 2021 theme is 'Restore Our Earth', which focuses on natural processes, emerging green technologies, and innovative thinking that can restore the world's ecosystems.
Check this website to learn more: