This is silly, but, hey — we’re silly. The good folks at Three Leaf cards have created a global warming themed e-card that pokes fun at global warming denialism. Send it to a friend — for free! — and promote TerraPass at the same time.
Three Leaf has a variety of other more serious and frequently quite lovely rich media e-cards available. And if you sign up for their for-pay service, 10% of your membership goes to their nonprofit partners. Check it out.