持久性有机污染物(Pops)会导致癌症和出生缺陷，而且降解速度非常缓慢。
Pops can cause cancers and birth defects and take a long time to degrade.
一旦被（化学）分散，随后浮油就更容易被进化到以碳氢化合物等天然污染源为食的细菌降解。
Once dispersed , the oil can then be broken down more easily by bacteria that have evolved to live off natural sources of hydrocarbons.
垃圾不降解这可以降低沼气的产生听起来这似乎是个好事情，但却大幅延长了污染风险存在的时间。
That may sound like a good thing because it reduces methane emissions and leachate. But it also spreads out the risk of pollution over a very long period.
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