Inhabitat's Week in Green: the power plant you can ski, and NASA's orbiting Nanosail-D

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

This week we saw new horizons dawn for green transportation as NASA's Nanosail-D became the first solar sail spacecraft to orbit the earth and President Obama issued a call for one million electric vehicles in his State of the Union Address. We also test drove the recently released electric Mini Cooper and took a look at several transportation breakthroughs that could clean up car emissions - researchers have developed an air pollution-fighting road treatment and Cella Energy claims to have created an emission free gas that costs $1.50 per gallon.

In other news, this week Qatar showcased designs for 9 sustainable stadiums for the 2022 World Cup and BIG unveiled plans for a plant-wrapped waste to power plant that doubles as a ski slope. Super cities are on the rise in Asia as China announced plans to construct a mega-city the size of Switzerland and SOM unveiled a masterplan for a cutting-edge green tech city for Hanoi. On the other hand, Dubai's architecture of excess is fading fast as a report revealed that the emirate's world-shaped archipelago of islands is sinking into the sea.

We also showcased the latest in portable tech as we brought you a brilliant Fire Department iPhone app that stands to save lives, and we rounded up our five favorite phone-charging green gadgets. And if you're looking for a case to carry it all in, check out these chic quilted iPad bags - just the thing to keep your kit cozy and protected during this month's blizzards.