And unlike plastic foam, it's biodegradable.

与塑料泡沫不同，甲壳素是可生物降解的。

Similar products run about to cents per plate, while plastic foam plates cost around three cents apiece.

类似产品的价格大约为每盘几美分，而泡沫塑料板的价格大约为每盘3美分。

They also include a lot of plastic foams, such as polyvinyl chloride and polyethylene.

它们还包括很多塑料泡沫，例如聚氯乙烯和聚乙烯。

We're not even really sure how long it takes for that plastic foam to break down.

我们甚至不确定塑料泡沫需要多长时间才能分解。