It therefore takes more energy to transport, and so entails greater emissions of greenhouse gases, which could be reduced by switching to lighter packaging.
因而运输过程中耗费更多能量，使得必排放更多温室气体，转而用更轻的包装能够减少这些气体的排放。
They offer environmental benefits by preventing food or other goods from being ruined in transit, as well as being far lighter to transport than alternative materials.
他们可以防止食品或其他物品在运输过程中毁损，有益于环境保护，也比其他材料更轻。
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