“While existing technologies can start us down the path, they can’t get us to our goal.” Ken Caldeira in the MIT Tech Review on why it should no longer be acceptable to dump carbon emissions into the sky.

+ If existing technologies aren’t enough, then what do we do? Enter a group of tech billionaires who are teaming up to help accelerate our efforts. It’s a long way from photo-sharing to saving the planet. But it’s worth a shot…