The first Earth Day on April 22, 1970, activated 20 millon Americans from all walks of life and is widely credited with launching the modern environmental movement. More than 1 billion people now participate in Earth Day activities each year, making it the largest civic observance in the world. As we begin the four year cout down to Earth Day's 50th Anniversary in 2020, Earth Day Network is pledging to plant 7.8 billion trees worldwide - one for every person on Earth. And so it begins. Today. Right here and right now. Earth Day is more than just a single day - April 22, 2016. It's bigger than attending a rally and taking a stand. This Earth Day and beyond, let's make big stuff happen. let's plant 7.8 billion trees for the Earth.