Three years left to limit warming to 1.5C, leading scientists warn
Summary
Scientists warn that the Earth may exceed the 1.5°C global warming limit in about three years if current carbon dioxide emission levels continue. Nearly 200 countries agreed in 2015 to keep global temperature rise below this level to avoid severe climate impacts, but continued high emissions of CO2 and other gases threaten this goal.Key Facts
- Scientists say the Earth could pass the 1.5°C warming limit in three years if emissions stay high.
- In 2015, nearly 200 countries aimed to limit warming to 1.5°C above the late 1800s temperatures.
- Current global CO2 emissions are about 40 billion tonnes per year.
- The "carbon budget," the amount of CO2 humans can emit to stay within the 1.5°C limit, has decreased to 130 billion tonnes.
- Last year saw record high temperatures, partly due to natural weather patterns, but mainly because of human activity.
- The Earth’s warming rate is about 0.27°C per decade.
- Atmospheric CO2 removal technologies exist, but scientists warn they may not fully reverse warming.
- "Earth's energy imbalance" shows heat accumulation has doubled compared to past decades, driven by CO2 emissions.
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