为什么塑料水瓶可能不像广告宣传的那样含有那么多再生塑料

许多塑料水瓶声称含有再生塑料，但实际上可能没有那么多。一种名为“质量平衡”的绿色会计方法可以证明产品是用再生塑料制造的，但并不能保证水瓶本身有多少比例是由再生塑料制成的。换句话说，即使水瓶上标明含有再生塑料，实际用量可能很低。

## Original Title: Why Plastic Water Bottles May Not Contain as Much Recycled Plastic as Advertised
## Article Content:
A green accounting method called “mass balance” certifies that something was manufactured with recycled plastic — just not necessarily much of the bottle making the claim.

Original article: https://www.nytimes.com/2024/08/26/business/energy-environment/tritan-renew-plastic-bottles-recycled.html