We blogged about Edward Burtynsky ages back, and now the award-winning Canadian photographer is back with a new film collaboration. Teaming with director Jennifer Baichwal for a second time, Burtynsky delivers a timely message about our relationship with our most precious resource... and the unspoken truth that we are stretching that resource far beyond its limits. Watermark is, like much of Burtynksy's photographic work (featured in the pair's first collaboration, Manufactured Landscapes), a stark look at post-industrial geography, and the dark beauty of our catastrophic relationship with the natural world. Recently shown at the Toronto International Film Festival, it promises to 'avoid didacticism', offering "a poetic and thought-provoking reflection on this most precious resource". Something to think about next time you pour bleach into your toilet.