Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us.

This week Inhabitat reported live from the scene of the Solar Decathlon in Madrid as 17 stunning solar-powered houses competed for the title of the world's most energy-efficient prefabricated house. The winner was just announced this evening and we're thrilled to see that an American team won: Virginia Tech's shape-shifting Lumenhaus. Considering that German teams have won the American Solar Decathlon for three years running now, we're really proud of the Virginia Tech team for their big win! We're also happy to see that several of our favorite solar houses from the show made it to the top ranks, including Germany's elegant IKAROS house, the ultra-efficient Armadillo Box, and Finland's beautiful wooden Luukku house.

We also watched sustainable transportation soar to new heights this week as the world's first solar-powered blimp prepares to fly across the English Channel. Not to be outdone, the US Army unveiled plans for an ultra-long range hybrid airship that is capable of flying for three weeks at a time.

In other news, renewable energy is heating up around the globe as the EU recently announced that it will import solar energy from the Sahara Desert within 5 years. We also saw a beautiful solar powered flower sprout in Southern California and looked at the worlds first solar-powered soccer ball, which could help the blind play soccer. Finally, we caught wind of an innovative breathing mask that filters CO2 from the air, converts it into energy, and stores it to power a cellphone or portable music player.