Thank you both for your input. I just realized how long the article was so I've decided to include and exerpt that captures the essence of Rothbard's case. His view doesn't suggest that property rights and the environment conflict, rather the opposite: property rights should be the sole means of enforcing environmental laws, not regulation. I found this copy at the Mises institute: "We have attempted to set forth a set of libertarian principles by which to gauge and reconstruct the law. We have concluded that everyone should be able to do what he likes, except if he commits an overt act of aggression against the person or property of another. Only this act should be illegal, and it should be prosecutable only in the courts under tort law, with the victim or his heirs and assigns pressing the case against the alleged aggressor. Therefore, no statute or administrative ruling creating illegal actions should be permitted. And since any prosecution on behalf of “society” or the “state” is impermissible, the criminal law should be collapsed into a reconstituted tort law, incorporating punishment and part of the law of attempts. . . . The tortfeasor or criminal is to be strictly liable for his aggression, with no evasion of liability permissible on the basis of “negligence” or “reasonability” theories. However, the liability must be proven on the basis of strict causality of the defendants action against the plaintiff, and it must be proven by the plaintiff beyond a reasonable doubt . . . The aggressor and only the aggressor should be liable, and not the employer of an aggressor, provided, of course, that the tort was not committed at the direction of the employer. The current system of vicarious employer liability is a hangover from pre-capitalist master/serf relations and is basically an unjust method of finding deep pockets to plunder. . . . These principles should apply to all torts, including air pollution. Air pollution is a private nuisance generated from one person's landed property onto another and is an invasion of the airspace appurtenant to land and, often, of the person of the landowner. Basic to libertarian theory of property rights is the concept of homesteading, in which the first occupier and user of a resource thereby makes it his property. Therefore, where a "polluter" has come first to the pollution and has preceded the landowner in emitting air pollution or excessive noise onto empty land, he has thereby homesteaded a pollution or excessive noise easement. Such an easement becomes his legitimate property right rather than that of the later, adjacent landowner. Air pollution, then, is not a tort but only the ineluctable right of the polluter if he is simply acting on a homestead easement. But where there is no easement and air pollution is evident to the senses, pollution is a tort per se because it interferes with the possession and use of another's air. Boundary crossing — say by radio waves or low-level radiation — cannot be considered aggression because it does not interfere with the owner's use or enjoyment of his person or property. Only if such a boundary crossing commits provable harm — according to principles of strict causality and beyond a reasonable doubt — can it be considered a tort and subject to liability and injunction . . . Finally, we must renounce the common practice of writers on environmental law of acting as special pleaders for air pollution plaintiffs, lamenting whenever plaintiffs are not allowed to ride roughshod over defendants. The overriding factor in air pollution law, as in other parts of the law, should be libertarian and property rights principles rather than the convenience or special interests of one set of contestants" (http://www.mises.org/story/2120#14). Zack