bd40bc7c7a 275 ^ Lear 1997, pp.43749; quotation from 449. Retrieved January 19, 2016. Rachel Carson's Legacy: The Silent Spring Series: Exploring Ethics. Thorndike, Me: G.K.  Lear, Linda J. The New York Times.
University of California Television, 2013. "PSO takes hard look at turmoil, both environmental and human". Pesticides-DDT-Rachel Carson-Silent Spring. Ellsworthmaine.com.  Darby, William. NASA Earth Observatory. DDT is no longer present in Americans body fat, mercury has disappeared from the Great Lakes, and the carcinogenic isotope Strontium-90 has virtually vanished from bones. The percentage of American children with elevated levels of lead in their blood has dropped from 88 to 4 percent; carbon monoxide and sulfur dioxide emissions have been halved since 1970; and 2010s cars were 98 percent cleaner than those of 1970.. van Emden and David Peakall, was published.. ISBN978-1-55470-191-9..