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Concentrations of greenhouse gases, particularly CO₂ , continue to rise. The year 2019 ended with a global average temperature of 1.1°C above estimated pre-industrial averages, second only to the record set in 2016. Without the role of El Niño in the warming increase observed in 2016, 2019 would have been a record year.

链接地址:https://digitallibrary.un.org/record/3894660?ln=zh_CN&v=pdf

     
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