dirtying

contagion corruption disease epidemic infection poisoning pollution

decay defilement filth foulness impurity pestilence plague rottenness spoliation taint

radioactivation

cleanliness purification sterility

cleaning cure healing sterilization

abuse corruption deterioration infection

adulteration blight decomposition defilement desecration foulness impairment impurity misuse profanation rottenness soiling spoliation taint uncleanness vitiation

besmearing besmirching fouling greenhouse effect polluting tainting

sterility

cleanliness purification