The UK has one of the world’s most aggressive building energy efficiency targets: all new homes to be zero carbon by 2016, and all new buildings to be zero carbon by 2019. They’ve got a ways to go toward realizing this goal, but they’re doing what they can to learn from other countries in the meantime. The Zero Carbon Compendium 2010 is a compilation of zero carbon building strategies and progress being made by nations all over the world. A good look at what was already possible a couple of years ago… and it’s a lot more than we’re talking about doing here today.