The algae can also be processed and used to create biodiesel fuel and fertilizer, as well as food for farm animals.

藻类经过处理后还能用来制造生物柴油、肥料和饲料。

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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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Now the EU is trying to shift biofuel production from food crops to farm waste, algae and straw.

BBC: EU acts against harm from biofuel crops