http://www.epa.gov/opptintr/pbt/ddt.htm    What is DDT? Persistent Bio-accumulative and Toxic (PBT) Chemical Initiative, Environmental Protection Agency, "Priority PBT's: DDT"   Prior to 1972, when it was banned, DDT was a commonly used pesticide. Although it is no longer used or produced in the United States, we continue to find DDT in our environment.   

 http://www.epa.gov/epahome/people2_0608.htm    People and Profiles, EPA, "The Power of One"  Rachel Carson was already a best selling author and government scientist before she wrote Silent Spring, a book that literally changed the course of history.  

  http://www.epa.gov/history/topics/ddt/02.htm       DDT Regulatory History: A Brief Survey, U.S. EPA History Office, "Background"  DDT (Dichloro-diphenyl-trichloroethane), for many years one of the most widely used pesticidal chemicals in the United States, was first synthesized in 1874 during WWII, the U.S. began producing large quantities of DDT for vector-borne diseases such as typhus and Malaria abroad.    

http://www.worldwildlife.org/toxics/progareas/pop/ddt.htm     Persistent Organics Pollutants (POP's),  World Wildlife Fund, "WWF's Efforts to Phase Out DDT",  While banned decades ago in the industrialized countries,  thousands of tons of the deadly pesticide DDT are still produced each year,  causing health and environmental hazards in the U.S. and throughout the world because of its long life and ability to travel great distances.

http://www.science.mcmaster.ca/Biology/4S03/SHB1.HTM       DDT AND ITS METABOLITES (DDE, DDD)     By Shawn Baskin  

http://pested.unl.edu/whatis.htm      Department of Environmental Protection, What is a Pesticide? Pesticides Education Resources, University of Nebraska-Lincoln, "Envirofacts";  Detailed description of pesticide, in relation to insecticides, herbicides, ovicides, fungicides, etc.  Also has examples of what is not a pesticide.      

Historic Pesticide Contamination Task Force, New Jersey Department of Environmental Protection,  "Historic Pesticide Contamination in New Jersey";  Historical perspective of pesticide use over the past 100 years. Distinguishes between  arsenical pesticides and organochlorine pesticides, including DDT.                             

Ames Report:  Bruce N. Ames, "Six Common Errors Relating to Environmental Pollution"   

Environmental Protection Agency, History of DDT in The United States

1 )  DDT Ban Takes Effect         

2)  DDT Regulatory History: A Brief Survey (to 1975) 

3)  New DDT Report Confirms Data Supporting 1972 Ban, Finds Situation 
     Improving 

4)  Olin Agrees to Clean Up DDT in Triana, Alabama Area  

Center for Disease Control (CDC)

DDT Exposures in a Natural History Museum -- Colorado  

History of the EPA  

http://ceris.purdue.edu/npirs   The National Pesticide Information Retrieval System (NPIRS^®) and the State Pesticide Information Retrieval System (NSPIRS) are collections of pesticide-related databases available through subscription. NPIRS State Public is a subset NSPIRS and is available to the general public free of charge.