These are the lungs of a chain smoker who was smoking for 30 years. Doctors from China extracted the organs after he died due to multiple lung diseases since

 These are the lungs of a chain smoker who was smoking for 30 years. Doctors from China extracted the organs after he died due to multiple lung diseases since the patient had signed for donating his organs after death.

See the difference between the normal and the charcoaled one:

Dont Smoke