Zerofootprint, a Toronto, Canada-based organization dedicated to fighting climate change, has announced a contest in which the winner will get $10 million for redoing an older concrete high-rise structure and, using re-skinning along with other retrofitting technologies, reduce its carbon, water and energy footprint to net zero. To secure the ZEROprize, a candidate building will be required to have a net-zero footprint for one year. Details for the contest can be found at