http://mattbruenig.com/2011/12/21/envir ... -ideology/
No story about freedom and property rights can ever justify the pollution of the air or the burning of fuels because those things affect the freedom and property rights of others. Those actions ultimately cause damage to surrounding property and people without getting any consent from those affected. They are the ethical equivalent — for honest libertarians — of punching someone in the face or breaking someone else’s window.
That is why environmentalism is such a huge problem for libertarians, and it is no doubt why so many of them are skeptical of the effects of climate change or other environmental issues. Admitting that someone’s use of their own property almost certainly entails an infringement on someone else’s property makes the whole libertarian position basically impossible to act out in the real world. A landowner could never get individual contracts with literally every single person that might ever be affected by the owner’s land-use (e.g. operating a coal-burning power plant). But a libertarian that was honest about environmental externalities would require such a landowner to undertake precisely that impossible task.