Tittle: The killer American diet that's sweeping the planet
https://www.ted.com/talks/dean_ornish_on_the_world_s_killer_diet?utm_campaign=tedspread&utm_medium=referral&utm_source=tedcomshare

Good sentence
1)All of which are completely preventable.
ex)All of the causes completely preventable by this solution.

2)It diminishing (to become or make something become smaller or less) after a year.
ex)The number of people is diminishing after a month.

3)Now there is an epidemic (a large number of cases of a disease that happen at the same time) of obesity (when someone is very fat in a way that is unhealthy)
ex)Now there is an epidemic of disease in the world.