Paraquat lung means: Paraquat lung is a form of lung disease that results from the use of the herbicide paraquat. This selectively builds up in the lungs, and can be highly toxic. The severity of the exposure will determine how bad your prognosis. Because the herbicide can only be inhaled directly to cause paraquat lung, it is very rare. In the 1970s paraquat was discovered to be a serious health problem when it was sprayed aerially by the US over illegal marijuana plants. Paraquat lung was caused by some of the plants that survived, and these plants were eventually sold to those who purchased the product.
(in Medical Dictionary)