By the 2030s, every second summer over almost all of the entire Northern hemisphere will be hotter than any record-setting hot summer of the past 40 years. By 2050, virtually every summer will be hotter than anything we've experienced to date.

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By the 2030s, every second summer over almost all of the entire Northern hemisphere will be hotter than any record-setting hot summer of the past 40 years. By 2050, virtually every summer will be hotter than anything we've experienced to date.