Large-scale disaster -- this time in the form of BP's crude oil -- has again hit the Gulf Coast, and with it have returned the familiar white trailers that the government provided to survivors of Hurricane Katrina years ago.

According to The New York Times, these trailers -- known to have high levels of formaldehyde, a carcinogen -- are popping up again in connection with the BP oil disaster, potentially putting more people at risk of the health problems associated with the industrial chemical: nasal cancer, upper respiratory problems, and leukemia.