Still, there are even more fascinating facts about Earth most of us don ... humans—have only discovered about 20 percent of Earth's waters. With a massive magnitude of 9.5, the world's largest ...

In honor of Earth Day, here are 25 facts about the history of our celebration ... according to the EPA. 20. U.S. automobile fuel economy increased 24 percent between 2004 and 2017.

Here are 10 interesting facts about Earth Day. Gaylord Nelson ... asking that question at the end of the 1970s.” More than 20 million people participated in the first Earth Day Millions of ...

With its beautiful rings, Saturn may be the most stunning planet in the solar system. It is the sixth planet from the sun and ...

Take the Earth Day quizzes to find out. Earth Day is an annual event that started in 1970 when 20 million Americans — 10% of the population of the U.S. at the time — came together to ...

Earth Day is on Tuesday, April 22, this year. The annual observation is set aside to increase awareness around environmental issues like climate change, pollution, endangered species and other global ...