It is clear, for example, that the carbon cost of transporting tomatoes from Spain to the UK is less than that of producing them in the UK with additional heating and lighting.
例如，从西班牙运输西红柿到英国的碳成本明显比在英国生产西红柿的碳成本要低，后者需要额外的加热和照明。
The home's existing gas heater ACTS as a back-up system and provides additional heating when needed.
房子原来的燃气加热器作为一个后备系统，在需要的时候提供额外的采暖。
The home's existing gas heater ACTS as a back-up system and provides additional heating when needed.
房子原来的燃气加热器作为一个后备系统，在需要的时候提供额外的采暖。
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