>> today on "earth focus" -- chememical pollulution. an american city fights back. and the toxic legacy of gold mining in peru. oming up on "earth focus." >> on a warm summer night, you can seeee where peoplple choooo live on toms river, riverboats, beaches, the promise of relaxing days and good health. but years ago the town became famous for a different reason, chemicals and cancer. >> we had no idedea they were discharging toxic chemicals. >> they y never should havave l the people of toms river drdrin that water. >> i know w where my son's canc came from. >> the company got caught. >> it's part of the duty of government to protect the public health an that didn't happen. >> if it happened here, it really can happen any place. >>>> the chemical history of to river began in 1962 when giba geigy, a chemical dye company built a industrial manufacturing plant. >> there wasasn't much h happen at toms river. chicken farming was the biggest industry. there was a little bit of tourism but not much. when this very lararge chemical concern said we want to build a factory t