By Katie O'Reilly
In the 12 years since Sierra began highlighting the best environmental practices of colleges and universities, the competition to be the ecofriendliest in all of academia has gotten fierce. This year, we received a record 269 responses from qualified institutions, which now include Canadian schools and community colleges. Our annual Cool Schools Rankings assess colleges' performance in everything from what they teach to how they obtain their electricity to their sources of cafeteria food and how they manage their water. Please join Sierra in congratulating the very green—and diverse—schools that are mastering the art and science of campus sustainability.