Professor Barton H. "Buzz" Thompson, Jr., is quoted in a New York Times article about the polar bear being put on the endangered species list:

Barton H. Thompson Jr., a law professor and director of the Woods Institute of the Environment at Stanford University, said the decision reflected the administration’s view that “there is no way, if your factory emits a greenhouse gas, that we can say there is a causal connection between that emission and an iceberg melting somewhere and a polar bear falling into the ocean.”