Meat vs Vegetarian Diet

There's has been a lot said about the advantages and disadvantages of both diets, so which is healthier?
Can you think of pros and cons of both diets?
Is the word vegetarian tantamount (=equal) to the word healthy eater? 

Watch  the video from http://www.huffingtonpost.com, a website about healthy lifestyle, which will help you answer the questions above

Jamie Oliver's TED Prize wish: Teach every child about food

I'd like you to watch a video, in which Jamie Oliver gives a shocking talk about nutrition, obesity and what we can do to live longer.
While watching, try to answer the following questions:

What is the most common cause of death in the USA nowadays?

Are diet-related diseases a problem that exists only in the USA? 

What accounts for a catastrophic situation with obesity?  

What are the solutions to the problem?