Sharpen your knowledge of environmental and social issues every Wednesday for the rest of the winter at the NFB Mediatheque (150 John St. At Richmond St. W). This week, catch Waterlife, an artsy look at the water from Lake Superior to the Atlantic Ocean, telling the story of the last huge supply of fresh water on the planet. Can’t go wrong with hypnotic natural imagery and a soundtrack by Sufjan Stevens. The film starts at 4 PM, and seating is first come first serve.

For a listing of the free favourites at four, check out the NFB Mediatheque schedule.