Which scenario provides a negative feedback loop for greenhouse gases existing in the atmosphere?
A) Greenhouse gases can not exist as a negative feedback loop for climate change.
B) Greenhouse gases at moderate level in Earth's atmosphere create a cooling effect on Earth.
C) Greenhouse gases such as carbon dioxide and methane that exist at moderate levels trap heat in Earth's atmosphere.
D) Greenhouse gases at low levels create the greenhouse effect, in return create too much warmin