A movie director for a movie that was very positively reviewed in The Guardian by an environmentalist (http://www.guardian.co.uk/environment/damian-carrington-blog/2011/may/16/meat-food-vegetarian-health-climate-pollution?)
but not by a film reviewer here: http://www.guardian.co.uk/film/2011/may/19/planeat-review?
This summary I like: "Documentary presenting a case for the personal and planetary benefits of eating less meat, via scientific evidence and tempting food-porn. A carrot, not a stick." (http://www.guardian.co.uk/film/2011/may/21/this-weeks-new-films)?
It's also on a podcast at 23 minutes 35: http://audio.theguardian.tv/audio/kip/science/series/science/1306511219145/1542/gnl.science.110530.jp.science_weekly.mp3