<unk> " refers to an environmental health issue involving defective<unk>  manufactured in China, imported to the United States and used in residential construction between 2001 and 2009 affecting "an estimated 100,000 homes in more than 20 states.". This is an isolated incident that is localised to the USA. In samples of contaminated<unk> , laboratory tests will detect off-gassing of volatile chemicals and sulfurous gases — including carbon disulfide, carbonyl sulfide, and hydrogen sulfide. The emissions worsen as temperature and humidity rise, will give off a sulfuric (rotten egg) odor and will cause copper surfaces to turn black and powdery, a chemical process indicative of a hydrogen sulfide reaction and an early indication of contaminated<unk> . Copper pipes, electrical wiring, and air conditioner coils are affected, as well as silver jewelry. Homeowners have reported health symptoms including respiratory problems such as asthma attacks, chronic coughing and difficulty breathing, as well as chronic headaches and sinus issues. corroded.
Chinese drywall
Pest house
Wellbee
Corn 
Whitlow
Straw 
Cowlick
Cold turkey