Nowadays, though, most are associated with a combination of phenomena including overfishing, warmer waters and, often, the washing into the sea of farm fertilisers and sewage.

然而现在，大多数赤潮与包括过度捕捞、海水升温和经常被冲入海里的农用肥料和污水的联合作用有关。

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Pollution from sewage or farm waste can cause excess algae growth, starving the water of oxygen and causing fish and other species to die off.

从下水道或者农场里出来的污染水引起藻类的过度生长，造成水里的氧气严重缺失，以至于鱼类和别的物种相继死去。

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Israel's ban on fertilisers had helped his plan to replace fertiliser with compost made from sewage that otherwise spills into the sea, and turn Gaza into a big organic farm.

以色列禁止向加沙运入肥料，这迫使其替用由污水制成的混合肥料，使加沙成为一个巨型的有机农场。要不然，那些污水将涌入海洋。

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