The majority of the third world
is unaware of words such as ozone and pollution. Birth control and condoms are scarce, and reproduction is a survival technique. They are generally uneducated and unknowledgable about things we take for granted. 50% of Central America is under the age of 21.
Of course, being educated about these problems doesn't equal caring about them. People are very simple minded. They eat themselves up to 300 lbs and then want to know how to get healthy after they have a heart attack. Then you've got these right-wing lunatics with massive followings like Limbaugh who fuel this nonsense that global warming isn't really happening.