Question

explain what would likely happen to global climate if there was a dramatic decrease in greenhouse gases trapped in the atmosphere.

Answer 1

Well then, life on earth would be much more easier !
The Earth's atmosphere would become less polluted, with less heat-trapping carbon dioxide, which threatens large-scale disruptions in climate with disastrous consequences.
The gobal climate would change positively, causing less catastrophic disasters to occur such as high recorded heat, drought, storms and fire.