Because it works! Earth Day broadens the base of support for environmental programs, rekindles public commitment and builds community activism around the world through a broad range of events and activities. Earth Day is the largest civic event in the world, celebrated simultaneously around the globe by people of all backgrounds, faiths and nationalities. More than a billion people participate in our campaigns every year.We celebrate Earth day in order to make us more aware of our environment. It began in the 1970's and continues today. I think we celebrate Earth day because we live off of the Earth we need Earths air we need Earths gravity. We need so many things from Earth, I mean we need water, food, air, gravity, medicine, supplies for shelter. Earth doesn't only give humans all those things it gives all the animals too. That is why I think we celebrate Earth day to give thanks to all the things it has given us.
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