Question

The assumption that chlorofluorocarbons would be ____ in the environment because they were chemically inert, was challenged by the demonstration of a potential threat to the ozone layer.

a) deleterious
b) innocuous
c) persistent
d) noxious
e) durable

Answer 1

Noxious is the correct anwer. Noxious means jarful or poisonous.

Answer 2

The correct answer is  d) noxious