After nearly three years since the largest gas blowout in U.S.history, residents of Porter Ranch still worry whether their health will be compromised five, 10 or 20 years down the road after breathing in not just methane gas, but an array of toxic, often cancer-causing chemicals spewed from an underground gas storage facility in and around their suburban neighborhood.
A key part of their quest is finding out what caused their nosebleeds, headaches, nausea and a few cases of cancer.
