Question

Which statement explains why many scientists believe that carbon dioxide has likely contributed more to global warming than other greenhouse gases?
A. Carbon dioxide is emitted from fertilizers used in farming.
B. Other greenhouse gases trap more heat than carbon dioxide.
C. Carbon dioxide has increased as a result of increased human activities.
D. Carbon dioxide is emitted from commercial refrigeration.

Answer 1

C is your answer. Commercial refrigeration and farming are human activities. B makes CO2 seem not as bad so it doesn't fit the question.

Answer 2

C) Carbon dioxide has increased as a result of increased human activities is your answer.