Cleantech is technology or ideas that offer competitive returns while considering the global environmental challenges that face our planet everyday. The cleantech challenge is a contest for the best cleantech idea. This contest is supported by the not-for-profit organization Sustainable Development Technology Canada (SDTC). SDTC’s mission is to build and encourage clean technologies that promote the health of our planet and its inhabitants. The winner of the cleantech challenge receives a trip to the SDTC Cleantech Focus in Toronto on November 9 to 10, 2011. Submissions can be in the form of a 200-word written response or 2 minute video. Only students attending a Canadian post-secondary institution are eligible. The deadline for contest submissions is October 15, 2011.