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Scientists warn that greenhouse gas accumulation is accelerating and more extreme weather will come

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Scientists warn that greenhouse gas accumulation is accelerating and more extreme weather will come.

The world now stands at about 1.24 degrees Celsius ( 2.23 degrees Fahrenheit ) of long-term warming since preindustrial times.

Crossing that limit would mean worse heat waves and droughts, bigger storms and sea-level rise that could imperil small island nations.

The mark is so important because once it is crossed, many small island nations could eventually disappear because of sea level rise.

Crossing the threshold “means increasingly more frequent and severe climate extremes of the type we are now seeing all too often in the U.S. and around the world — unprecedented heat waves, extreme hot drought, extreme rainfall events, and bigger storms.