UN: World could hit 1.5-degree warming threshold by 2024


GENEVA (AP) — The world could see annual global temperatures break a key threshold for the first time in the coming five years, the U.N. weather agency said Thursday.

The World Meteorological Organization said forecasts suggest there's a 20% chance that global temperatures will be 1.5 degrees Celsius (2.7 Fahrenheit) higher than the pre-industrial average in at least one year between 2020 and 2024.

The 1.5 C mark is the level countries agreed to cap global warming at in 2015. While a new annual high might be followed by several years with lower average temperatures, breaking that threshol...

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