Assertion: modern landfill | /r/CapableOf | collect escaping liquid
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Source sentences:
text: But in fact, municipal landfills contain many dangerous substances besides lead and mercury, and even though modern landfills collect escaping liquids to prevent them from contaminating groundwater, this leachate must be treated: "a major expense and a burden on already-encumbered municipal sewage treatment plants," according to the EDF.