EcoWatch: You probably know most vegetarians than you used to. You may even know some veganspeople who eat no animal products, including eggs, butter, milk and cheese. But did you know that their dietary habits may be essential to save the planet? A new research paper from UK think tank Chatham House, LivestockClimate Changes Forgotten Sector, explains why it may be necessary for a lot more people to go vegetarian or at least dial down their consumption of meat and dairy products, and how to get them to...