(CNN) — First it was catastrophic lava. Then it was sulfur dioxide. Now Big Island residents have yet another danger to worry about. Laze -- a mashup of "lava" and "haze" -- is a nasty product formed ...

Delaware City Refinery is releasing high levels of the toxic sulfur dioxide, DNREC reports say. DNREC says the spill is the result of a boiler issue and is being repaired. Even limited exposure to ...

Venture too close to the hydrothermal vents dotted around Yellowstone National Park and you will be met by a powerful stench reminiscent of rotten eggs. These calderas are a (literal) hotbed of ...

The transport company has been the target of complaints in the past, including from environmental groups concerned over the potential spills of toxic cargo.

This story has been updated to remove an erroneous statement by the EPA that Make Sunsets had been banned in Mexico. Make Sunsets was not banned in Mexico, and the EPA has since corrected its ...