Gather current and former Mossville, Louisiana, residents in a room and you're likely to hear a litany of health problems and a list of friends and relatives who died young.

"I got cancer. My dad had cancer. In fact, he died of cancer. It's a lot of people in this area who died of cancer," says Herman Singleton Jr., 51, who also lost two uncles and an aunt to cancer.

Singleton and many others in this predominantly African-American community in southwest Louisiana suspect the 14 chemical plants nearby have played a role in the cancer and other diseases they say have ravaged the area.