Excellent article at the Technology Review website about the growing use of smart building systems as a method of increasing energy efficiency. The details of the diverse mechanisms employed won't come as a real surprise to most WorldChanging readers, but it's good to see them collected in a single article. The article includes a couple of interesting claims: since 2000, around 19,000 people have been LEED accredited (the article then says that 9,000 were accredited "in the last month alone," but that claim seems a bit hard to accept without evidence, and I found no reference to that number at the LEED website); and about 4 percent of new commercial construction is now done under LEED guidelines.