Question

When they occur, greenhouse gases are_______ a0, because they are long lasting and do not just disappear into the air.

Answer 1

Greenhouse gases are REALLY bad for the environment and one of the major cause of global warming. Greehouse gases can stay lasting in the air for 20 to 200 years.

Answer 2

When they occur, greenhouse gases are "cumulative", because they are long lasting and do not just disappear into the air.