carcinogen

Federal and state regulators have found in the past that the chemical compound is a potent carcinogen with no safe level of exposure.

But a recent FAA-funded study found two chemicals that can: formaldehyde, a known carcinogen and neurotoxin, and tridecane, which can cause headaches and stupor.

Long-term exposure is even worse, with the EPA website noting that “EtO is a human carcinogen. It causes cancer in humans.”

"Large quantities of dioxin and furan have been added to the atmosphere and these are carcinogens. And then we have calculated it may kill about 70 people in our country," says Prof Guneeardena.

The test results also found high levels of chromium — which, in some chemical configurations, is a carcinogen — on one campus.