Tonight CNN completes its two-day special report, "Toxic America," detailing some of the ways Americans are exposed to toxic chemicals, their effects, and what can be done to reduce human exposure.

"Colorado Democrat Diana DeGette withdrew a proposed amendment today from House water legislation that would have expanded regulation of a controversial oil and gas production technique some say has contributed to groundwater pollution."

"The federal Agency for Toxic Substances and Disease Registry has been under tough Congressional scrutiny over the last two years for what critics assert are flawed evaluations of health risks at the nation’s worst contaminated sites. Now the Government Accountability Office has issued a report detailing some problems with the agency’s internal policies and inconsistent monitoring by its management."

"The nation's premier public health agency knowingly used flawed data to claim that high lead levels in the District [of Columbia]'s drinking water did not pose a health risk to the public, a congressional investigation has found. And, investigators determined, the agency has not publicized more thorough internal research showing that the problem harmed children across the city and continues to endanger thousands of D.C. residents."

"A landmark study will include some evidence that those who regularly hold long conversations on handsets are at increased risk of developing potentially fatal brain tumours."

"More than half of the students tested in Detroit Public Schools have a history of lead poisoning, which affects brain function for life, according to data compiled by city health and education officials."

Canada's asbestos industry continues to push the message that asbestos is not toxic. Health experts think the truth will eventually prevail.

"A cancer report that concludes Americans are under constant assault from carcinogenic agents has heartened activists, who hope that finally government and policymakers will pay attention to their concerns. But the report from the President's Cancer Panel on Thursday has underwhelmed most mainstream cancer experts and drawn only a puzzled response from the White House."

"The true burden of environmentally induced cancers has been grossly underestimated," says the President's Cancer Panel in a strongly reported report that urges action to reduce people's widespread exposure to carcinogens."

"Insecticides such as DDT have long been used to combat the scourge of malaria in the developing world. But with the disease parasite becoming increasingly adept at resisting the chemical onslaught, some countries are achieving striking success by eliminating the environmental conditions that give rise to malarial mosquitoes."

"A rare and dangerous fungal infection named Cryptococcus gattii has been quietly spreading from British Columbia southward to the U.S. Pacific Northwest. And it's changing as it goes. ... The most striking thing about this fungus is that it's popping up and establishing itself far afield from its usual range -- possibly because of climate change."

The sand used to give blue jeans that worn look can cause silicosis, a potentially lethal lung disease -- in workers.

"Some soldiers and their families have had to live in deplorable conditions at Fort Bliss, dealing with black mold, lead paint and asbestos affecting the health of them and their children. Now there are allegations of threats and intimidation by top commanders if soldiers and their families spoke out about the problems."

A report issued by the National Academies' Institute of Medicine concludes that military service in the Gulf War has been a cause of the multisymptom illness known as Gulf War Syndrome.

"After almost two decades of delays, the Environmental Protection Agency said Thursday that it was on track to implement a regulation requiring the construction industry to help prevent cases of lead poisoning among children."