Earth Day Fun Facts:

• First Earth Day was April 22, 1970.

• Earth Day is known as the largest civil observance in the world - over 1 billion people across the globe now celebrate it.

• April 22 is the first official day of Spring in the Northern hemisphere and of Fall in the Southern hemisphere and was chosen to be Earth Day for this reason.

• Soon after that very first social commitment to our planet, the government followed suite by pushing groundbreaking environmental laws such as the Clean Air Act, Clean Water Act and Endangered Species Act.

• Only 11% of the earth's surface is used to grow food.

• The world's first national park was started in 1872 at Yellowstone National Park in the US.