Eat less meat: UN climate change report calls for change to human diet
I think one problem is that people don't realize they could not only survive, but live healthy, satiated, and even build muscle on a vegetarian diet(without protein shakes etc, just regular grocery foods).  I feel like if more people realized this, they would consider eating meat more often.  I personally love that I rarely have to worry about maggots in my garbage bin because there would be nothing that would be interested for them to be eating.