[Excerpt] "The skies, soil, and water of every state are polluted every day. Whether the pollutants enter the atmos phere from coal plants or the water-ways from large farms, materials a bnormal to the “natural” environment are regularly emitted by a variety of sources over wide regions of the nation. To some extent, such emissions are normal and acceptable activities in modern society."
Paul Homer, Indivisible Injury Negligence and Nuisance Cases – Proving Causation Among Multiple-Source Polluters: A State-by-State Survey of the Law for New England, and a Proposal for a New Causation Framework, 3 Pierce L. Rev. 75 (2004), available at http://scholars.unh.edu/unh_lr/vol3/iss1/6