Who knew? It’s World Environment Day. This UN holiday doesn’t get as much press as Earth Day in the U.S., but this year it’s especially poignant since it comes exactly 6 months before the beginning of the Copenhagen Climate Change Conference, the successor to the ill-fated Kyoto Protocol. If you’re up for a bit of light reading this weekend, some of the documents covering the conference have been released; a refreshing glimmer of transparency. Otherwise, if you catch this in time, the Institute of Contemporary Art is having a free showing—along with venues around the world—of Yann Arthus-Bertrand’s documentary film, “Home.” The spectacular aerial imagery narrated by inveterate actress Glenn Close begins at 7PM, and the doors open at 6 this evening. However, if you can’t make it YouTube is hosting the entire film (in multiple languages) at http://www.youtube.com/homeproject along with commentary, making-of, etc. plus “Born to be wild: Giraffes on the move” and “Koyaanisqatsi.”