1.) Assessing Abu Dhabi's Masdar, the world's first zero-carbon city.
2.) Columbia University on the BP-Transocean Gulf of Mexico oil spill: "The largest marine oil accident ever."
3.) Teaching, showing, involving: on education and an "inconvenient youth."
4.) The problem with too much clean energy in 2010: it goes to waste.
5.) Spanish design firm Dream and Fly is bringing tiny hotel rooms to airports.
This post was originally published on Smartplanet.com