And processing those raw ingredients into synthetic textiles also uses a lot of energy, further compounding that pollution.

将这些燃料加工成合成纺织品也会消耗很多能量，进一步加剧了这种污染。

For starters, the heel, insole, midsole, and upper layer are usually made from synthetic textiles like polyester, nylon, latex, and polyurethane.

首先，鞋跟、鞋垫、鞋底夹层和鞋面通常由合成纺织品制成，像聚酯、尼龙、乳胶和聚氨酯。