Recent Increase in Hurricanes Part of Normal Weather Cycle?

There are those who attribute the recent changes in hurricane patterns to global warming. Others, however, say that there is a normal long-term weather cycle in which decades of relative hurricane "quiet" alternate with decades of increased activity. There was an "active" hurricane period which lasted from the mid '40s to the mid '60s, and the latest "active" period began in the mid '90s.

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