税收也可以作为环境保护的一个重要工具。许多经济学家认为，征收碳税会是减少温室气体排放的最佳途径。
Taxes can also be an important tool for environmental protection, and many economists say taxing carbon would be the best way to reduce greenhouse gas emissions.
而许多经济学家认为经济增长趋势会下降到每年2%左右。
And some economists think it could have fallen to around 2%.
许多经济学家认为，引发危机的的直接原因是“全球房地产泡沫之母”。
The immediate cause of the crisis, “the mother of all global housing bubbles”, was spotted by many economists.
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