Earth Day is a global campaign to raise environmental awareness and inspire the masses (that's you) into taking green infused action (not just talking about it). It's a good idea.
Here is what I wrote about Earth Day for Green Parenthood; Earth Day Is Tomorrow,
and here is what the Earth Day Network has to say about it.
A Billion is real big number and depending on what part of the world you are from it will have 9 or 12 zeros. The English speaking portion of the world means a thousand million (9 zeros) when they say a billion. The rest of the world defines a billion as million million (12 zeros). Weird huh?
Anyway the Earth Day Network has set humanity a goal of making A Billion Acts of Green before 4th June 2012. An act of green is anything that is good for the earth or that tells others to be good to the earth, ie. an act of environmental service or advocacy.
This link is to my article on A Billion Acts of Green and this is the real A Billion Acts of Green website, were you should go to record your good green deeds.