Unfortunately for sub-Saharan Africans and some Asians, the U.S. ban on DDT has made this cheap (though [[teratogenic]]) chemical<ref>[http://extoxnet.orst.edu/pips/ddt.htm Toxicology Network]</ref> very difficult to obtain. This helped lead to a renewed [[malaria epidemic]], and more than one million people die of malaria every year. | Unfortunately for sub-Saharan Africans and some Asians, the U.S. ban on DDT has made this cheap (though [[teratogenic]]) chemical<ref>[http://extoxnet.orst.edu/pips/ddt.htm Toxicology Network]</ref> very difficult to obtain. This helped lead to a renewed [[malaria epidemic]], and more than one million people die of malaria every year. |