What percentage of the world population is vegetarian?
This is not correct. The question was world population and vast areas of china and other areas are vegetarian making the majority of the planet vegetarian. Refer to the book The China Study and other sources that collect this information to confirm this. Much of this was discovered when it was realized that vast tracts of the world have virtually no heart disease and that extensive studies and surveys over 50 years(!) showed conclusively that plant based diet of these areas was the culprit. See also the work of Dr Esselstyn from the Cleveland heart clinic (and others)for facts and figures.
