Answer:
Explanation:
A group of two or more smaller molecules is the correct answer
Answer:
Coating a material with metal
(SInce the glasses will be coated with gold.)
Answer : Any natural sources of CFC's are not known only the major sources like aerosols, propellants, refrigerants,etc are known. So, if any natural sources are given then it cannot be called as a major source for emitting CFC into environment.
