UN says last four years were hottest on record | Al Jazeera English
Scientists in the US are sounding the alarm on climate change after logging one of the warmest years on record.
A joint report by researchers from two government agencies including NASA ranks 2018 as the fourth-warmest year so far.
It says this is leading to rising sea levels, drought and more destructive hurricanes.
Al Jazeera's Heidi Zhou-Castro reports.
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