全球变暖正在导致北极冰层加速融化。

___Global warming is causing the Arctic ice to melt faster.

冰川融化是全球变暖最明显的迹象之一。

Melting glaciers are one of the clearest signs of ___global warming.

许多国家正在讨论如何减少全球变暖的影响。

Many countries are discussing ways to reduce the impact of ___global warming.