除非农村经济能够生产足够的额外粮食来养活更多的人，否则人口不可能增长。

Populations cannot grow unless the rural economy can produce enough additional food to feed more people.

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但它们的间接影响：与粮食作物的竞争，额外开垦荒地种植的需要，还有在提炼过程中的消耗能源——所有都会造成影响。

But their indirect environmental "bads" -competition with food crops, the need to clear virgin land to grow them, and the energy costs of processing them-all cause anguish.

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在其他的变化方面，用来计算批发价格指数的篮子中的粮食产品的额外补贴去年从26.9%减少到24.3%。

Among other changes, the weighting of food products in the basket used to calculate the WPI was reduced last year to 24.3% from 26.9%.

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