Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970.
According to Earth.org, more than 1 billion people in 192 countries now participate in Earth Day activities each year, making it the largest civic observance in the world.
Earth Day is widely recognised as the largest secular observance in the world, marked by more than a billion people every year as a day of action to change human behavior and create global, national and local policy changes.
The theme for this year's Earth Day is "Restore Our Earth" which focuses on natural processes and emerging green technologies that can restore the world's ecosystems. In this way, the theme rejects the notion that mitigation or adaptation are the only ways to address climate change.
