农业排水和来自发电厂的污染给北美的许多沼泽增加了额外的氮。
Agricultural run-off and pollution from power plants are adding extra nitrogen to many bogs in North America.
不管在泥炭沼泽上进行何种施工，最大的风险是扰乱排水后将会造成整个山坡被水淹没，或导致泥炭干涸而崩塌滑坡，且最终氧化。
One of the big risks for any construction on peat bogs is that the disrupted drainage will cause whole hillsides of waterlogged or dried out peat to slide and eventually oxidise.
人类还通过给沼泽地排水、凿石劈山、修建公路和铁路等方式，改变了地球的面貌。
Man has also modified the face of the earth by draining marshes and cutting through mountains to build roads and railways.
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