[eesmith]

You cannot focus on only the negatives to determine if something is worthwhile.

We banned leaded fuels for cars. That made driving more expensive for people with older cars with engines designed for leaded fuel.

It also removed a lot of lead pollution.

The ban on CFCs for most air conditioning meant people had to find substitutes, and switch out cooling systems. That was expensive.

But it did not outweigh the effects of the increasing hole in the ozone layer.

People die every year from CO poisoning due to their gas furnaces.