新闻视频：联合国秘书长希望美国提高温室气体排放量

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[UN Chief Asks to US Cut Emissions by 2030]

As the Global Leaders Summit on Climate is set to begin in the US this Thursday, United Nations Secretary General Antonio Guterres urged the US yesterday to half its greenhouse gas emissions by 2030.

The White House is widely expected to unveil a target to cut emissions lower than that level, which would be equivalent to a 47 percent reduction by 2030 when compared with 2010 levels. Guterres also raised alarms over the climate report that shows 2020 was one of the three hottest years on record. Scientists say global emissions must plummet this decade and reach net zero by 2050 in order to limit global warming to 1.5 degrees Celsius above pre-industrial levels in order to prevent disastrous climate impacts. 

美国主办的全球领导人气候峰会，本周四即将开幕。昨天，联合国秘书长古特雷斯表示，希望美国能在会议中"带头"提高减排目标，承诺到2030年，温室气体排放量比2010年减少50%以上。

不过，外界普遍预测，白宫即将提出的减排目标可能低于这一标准，设定在比2010年减少47%左右。

近年来，气候变暖引发的自然灾害愈发频繁。为了将全球平均气温的升幅控制在1.5摄氏度的"红线"之下，科学家提出了全球温室气体排放量必须在2030年前锐减，并且在2050年前达到"零排放"的目标。