How do you celebrate the Earth Day?

A magazine is planning to have a long march around the town. The more the merrier, the longer the march the more successful. I have no trouble imagining it. People, young and old, man and woman, in probably the same attire with colorful flags and hats, would be walking enthusiastically, making a long line along the cheering streets on a sunny morning. Some would be singing, others talking and laughing, few walking quietly, and several enjoying the view. Then in a few minutes, some would be thirsty. Then in the next hour, some would be hungry. Then on the long streets they had left behind, many kilometers away, you would find tissues, plastic bags, plastic glasses, straws, paper bags, lost hats…, quite a sum of garbage!

So, how do you celebrate the Earth Day?