For Andersen, his interest in the effects of animal agriculture started about seven years ago. Released June 2014, the documentary, "Cowspiracy," follows Andersen on his journey for answers. He reaches out to large environmental organizations including: Greenpeace, Sierra Club, and Surfrider, to try and uncover the possible reasons why no one is talking about this issue.
He was met by more than a few brick walls. Greenpeace, the popular environmental organization, refused to speak with him on the issue, claiming "they would not be able to help this time."
So, why is this? Most environmental groups don't want to step on toes, claiming it's too much of a personal issue that is tied to culture, upbringing, etc. Telling people to change their eating habits can also cause controversy among members, other organizations, and sponsors.
The controversy over this topic is growing around the world. In Brazil, rainforest campaigners are being targeted and imprisoned. "More than 1,000 activists, small farmers, judges, priests and other rural workers have been killed in land disputes in the past two decades," according to a watchdog group Catholic Land Pastoral.