By cooling the poles enough during the summer to maintain sea ice, the sunshade triggers the same powerful feedback that amplifies CO2 warming, but in reverse.

• 只要夏天时极地降温的幅度足够维持海冰不会融化，那麽遮蔽阳光所带来的效果，便足以和CO2加速极地暖化的效果相抗衡。