Here’s a Reason link to Dr Paul on the environment. The important section:
When all forms of physical trespass, be that smoke, particulate matter, etc., are legally recognized for what they are — a physical trespass upon the property and rights of another — concerns about difficulty in suing the offending party will be largely diminished. When any such cases are known to be slam-dunk wins for the person whose property is being polluted, those doing the polluting will no longer persist in doing so. Against a backdrop of property rights actually enforced, contingency and class-action cases are additional legal mechanisms that resolve this concern.
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To the extent property rights are strictly enforced against those who would pollute the land or air of another, the costs of any environmental harm associated with an energy source would be imposed upon the producer of that energy source, and, in so
doing, the cheap sources that pollute are not so cheap anymore.
My understanding of Rothbardian law policy in this area is that rights to pollute exist and can be bought and sold. So, while it’s true that at one time people whose physical property rights were invaded by pollution would have had legal remedy against the polluter, the case that current property owners have recourse would be much murkier from a Rothbardian perspective.
For example, suppose A lives next to a plant that starts polluting. At this time the government prohibits A from seeking redress through the courts. Consequently the value of A’s property falls from $100 to $80. Then say that B buys A’s property at this new value of $80. My understanding of Rothbardian law would suggest that B has no recourse against the plant. Instead the plant now, effectively has a right to pollute. The government screwed up, but there is no good way to rectify the screw up from a Rothbardian perspective that I can see.