Answer:
He wants to talk about how our diet affects our lives and the lives of others.
Step-by-step explanation:
Mark Bittman in his Ted Talk wants to convey a message about our eating habits. According to him we eat in excess, in a wrong and selfish way. He says that in addition to eating more than we should, we eat the wrong things that don't do us any good.
He also says that this irresponsible consumption affects our health in many ways, and not only that, it also affects the lives of people who have nothing to eat.