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Earth is the only planet in the known universe that has the right combination of water, atmosphere, temperature, and chemical elements to support life. The temperature at the Earth's inner core is estimated to be around 5,400°C (9,800°F), nearly as hot as the surface of the sun.

Earth Day is celebrated on April 22 each year, promoting environmental protection and awareness since 1970.

Earth Day has always been a day that acknowledges our planet, which provides for us, and ways we can protect and preserve its beauty. That being said, here's everything you should know about Earth Day 2025, and its 55th annual celebration. Earth Day falls on April 22 every year. This year, it falls on a Tuesday.