[OrangeMusic]

Look it's not that hard. Is <problem> (in this case, pollution) a problem that needs solving? If the answer is yes, then it needs to be regulated even if you personally don't like laws. Sorry!

[quotemstr]

Why is <problem> a problem? Because you say so? If it's such a problem, why is it so cheap to do? What cost is unaccounted?

[mulmen]

By definition externality is not priced in by the market.