Of all the geoengineering ideas, the one often cited as the simplest, most obvious one, the one we should get started on right away is painting roofs white -- after all how can that not help? How indeed.
Reflective white roofs are good for keeping a home cool in summer, but what happens in winter? A temperature-sensitive tile -- black when temperatures are cold and white when temps are warm -- could offer a solution.
As with looking toward better sanitation options in Finland, some potentially critical sessions proceed with too little media attention. Right now, Boulder, Colorado, is hosting one such meeting: North American Biochar 2009.