04/22/2011 02:41 pm ET | Updated Jun 22, 2011

Earth Day Activities: How To Get Involved (PHOTOS)

Exactly 41 years ago today, the inaugural Earth Day was celebrated with 20 million participants in the United States. Today, April 22, 2011, Earth Day is bigger than ever, with estimates of more than one billion people expected to participate worldwide.

There are a number of opportunities for you to get involved. Earth Day activities range from a picnic to attending an event or sending a text message donation. (And there are plenty more ideas below.)

By choosing to live a green lifestyle, you will not only be improving the environment, but also your health and the well-being of generations to come.

What are you doing this Earth Day? Add your activity to the slideshow below, or tweet it to us using the hashtag #EarthDayFun.

Earth Day: Get Involved