Do we need so much meat?

In my opinion one of the main world's environmental problems is that we produce too much meat. Cattle breeding is taking too much of the world's resources. There is so much water needed, feed planted, so much carbon dioxide expelled etc. The truth is that we people don't need so much meat to live. Well, I would say that we don't need it at all as I am a vegetarian. It is possible to replace the meat with a well balanced diet and it is really easy to do. There is only a change of habits needed. Apart from saving the world there are other benefits like a much healthier life and a better look. I think that the main reason that we eat so much meat is that it suits food industry.