[JordanFarmer]

Yet moderate smokers of 40+ years have no higher risk than non smokers... Strange (just ask my 96yo grandmother who smoked for 42yrs and is still sharp as a pin mentally)

There are a lot of other bad things that the people in Mexico city are exposed to. Why blame Alzheimer's on air pollution???

Oh, wait... thought Herpes got in the brain and caused it...

Scientists don't have a clue what really causes it (yet they have many clues). Probably 1,000 different things which affect 1,000 different people , well differently.