It’s Earth Day today, and I’m delighted to be giving away five Energy Seals, worth $16 each, from the very generous Powered Green to 5 of our US readers.

An Energy Seal is a sticker made from recycled aluminium that represents a carbon offset for a computer. Each Energy Seal symbolizes that renewable energy sources have produced an equal amount of energy used by a single computer over the course of its lifetime. The Energy Seal is then placed on the outside of a computer to show support for clean energy.

Powered Green is an environmental start-up based in Madison, WI, founded by two recent UW – Madison graduates. Their efforts support the development of new wind projects across the country through the sale of Powered Green gear. Each product stands as a way to generate awareness and support for renewable energy on an individual basis. Their efforts in less than a year have already stopped over 1,000 tons of CO2 from reaching the atmosphere.

To stand a chance to win one of these Energy Seal stickers for your computer, please leave a comment here about your Earth Day plans. Five comments will be chosen at random to each receive a free Powered Green Energy Seal, and the winners will be announced here on Sunday 2nd May 2010. Please note that this giveaway is only open to readers with a US mailing address.

And the winners are…

Kristi, Tiffany Pettey, Miranda johnson, Nick and Chrystal. Congratulations, you’ll soon be working/playing on a computer with a carbon offset!  Winners, please reply to my email requesting your mailing address.

UK readers: keep a lookout for a new sponsor giveaway tomorrow, just for you!