While it cannot be scientifically proven (or disproved, for that

While it cannot be scientifically proven (or disproved, for that matter) that global warming caused any particular extreme event, we can say that global warming very likely makes many kinds of extreme weather both more frequent and more severe.
【正确答案】：尽管在科学上还无法证明（或否定）是全球变暖导致了某些特定的极端天气，我们还是可以说全球变暖很可能使多种极端天气发生得更频繁、更恶劣。