Pollution regulations are an obvious example. Car emission regulations seem to be a pretty good thing, what with the distinct lack of smog in major US cities these days. Yet, if given the choice to opt in or opt out of the regulations, people would generally opt out, as it's cheaper for them personally. The result would be the return of car-related smog.
Car regulations are a great thing, and pollution levels have decreased a lot, even in LA.
Pollution is still a significant problem in LA.
> “Ozone and particle pollution contribute to thousands of hospitalizations, emergency room visits, and deaths every year,” Dr. Kari Nadeau, a Stanford Medical School professor and American Lung Association researcher, said when the State of the Air report was released. “Air pollution can stunt the lung development of children, and cause health emergencies, especially for people suffering from chronic lung disease, including asthma, chronic bronchitis, and emphysema. Both long-term and short-term exposures can result in serious health impacts.”
