Gossip time again:

http://www.examiner.com/article/dire...oys-the-planet

While some vegans cite health as the primary motive for following the plant-based diet, Cameron, 58, says his decision was driven by ethical reasons.
"Its not a requirement to eat animals, we just choose to do it," Cameron told the Calgary Herald. "So it becomes a moral choice and one that is having a huge impact on the planet, using up resources and destroying the biosphere.
More here.