But protecting coral reefs would bring the highest returns, amounting to an extraordinary $24 worth of benefits for every dollar spent. Like forests, coral reefs provide multiple services – including tourism and fish nurseries, which help to sustain commercial fishing – and have an intrinsic value to people.
但保护珊瑚礁的回报最高，每一美元投入带来的收益高达24美元。与森林一样，珊瑚礁也起着多方面作用——包括作为旅游景点和鱼类营养源（有助于商业捕鱼）——并且具有对人类的内在价值。将珊瑚礁损失降低一半需要每年耗费30亿美元，但至少能产生720亿美元收益。