this is a great contest, going on for awhile already, regarding all the activities around global warming:
The media company current.tv is based in San Francisco. In case you don't know (is that possible?) - the company is led by former Vice President Al Gore.
Go for it, if you're a film-maker or not - create your own 15, 30 or 60 secs on video, and tell the world what YOU think is a great contribution in preventing any more global warming activities! But be quick - the deadline is approaching fast!