Last Thursday was the 40th Anniversary of Earth Day… and we’re still feeling green about the environment! If you are too then you’ll be interested in the list we put together of the 40 best websites for advertising to green consumers.

This “best of” list includes lots of eco-friendly websites to consider for your advertising dollars (all marketing budgets welcome!)

For example, websites dedicated to keeping everyone informed about environmental issues such as Mother Nature Network, Grist, and WebEcoist; those geared towards providing ideas and tips for living a sustainable lifestyle including TreeHugger, Worldchanging, and The Sustainability Ninja; along with sites offering a sense of community for people who want to make a difference, such as Care2 and Green Options.

The complete list of the Best Websites for Advertising to Green Consumers can be found on our Leadtail blog – Best Online Advertising Stuff.

Keep in mind that for many people, “going green” is a way of life, not a single act or purchase. Invest the time to craft the right message for this progressive audience, and you’ll be taking your “sustainable” sales growth all the way to the bank (in your hybrid car, of course)!

Know of a great green site that didn’t make our list? Share it in the comments!