If you want a great way to contribute to the improvement of marine life, wildlife, forests and land, try http://www.facetheplanet.com/. Face The Planet allows people to purchase virtual landmarks via donations to various causes.
Landmarks can be searched through an embedded Google map, but contributors can also search by city, state (or province), building names and country and any other location searchable on Google maps. Once a location is found, it can be checked for ownership. If a specific location is available, it can be purchased. Everything from lakes to highways to airports can be purchased. Donations start at $3 and up. The website accepts major credit cards or Paypal.
Go to http://www.facetheplanet.com/ and watch the YouTube video right on the website.