The theory is that because of a fall in solar radiation of about 6 percent and a dropoff in the production (or retention) of greenhouse gases, Earth essentially lost its ability to hold on to its heat.

那种理论认为，由于阳光的照射量减少了约6%，产生（或保留）温室气体的能力降低，地球实际上堆以保持其热量。