To further confuse matters, different carbon footprinting and labelling standards have emerged in different countries, preventing direct comparisons between the various types of label.
让事情更为混乱的是，不同的国家出现了不同的碳足迹和标签标准，这使得不同的标签之间无法做直接的比较。
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Proponents of menu labelling hope that knowing what is in their food may direct people to healthier items.