I've always desagreed with "one day" celebrations; because I think every day we should be aware, in this case, that the Earth, that "big blue marble" floating in the space, it's the only planet we have and if we do wrong in one point, say, deforesting the Amazon, in Europe we will have some problems to breath. Right now, for example, the cloud of the Iceland volcano it's causing problems in the air traffic of all Europe.
So, how I wish to celebrate Earth Day? Well, wishing that this tree which I've been watching in the last twenty years, growing and changing with every season, will be watched by the generations that will follow me. Happy Earth Day!