填空题

No matter what the methods we use, the final result is that we will need to decrease CO₂emissions by 70% to 80% simply to stabilize ______.

【参考答案】

atmospheric CO₂concentrations
由题干中的定位词CO_{2......

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填空题

The US Bush administration, says the scientific uncertainty over the pace of climate change is causes for ______.

单项选择题

No matter what the methods we use, the final result is that we will need to decrease CO2emissions by 70% to 80% simply to stabilize ______.