The report concludes that today’s average global rate of consumption would need 1.5 planet Earths to sustain it. But four planets would be required to sustain US levels of consumption, or 2.5 Earths to match UK consumption levels.
The fastest decline among the animal populations were found in freshwater ecosystems, where numbers have plummeted by 75% since 1970. “Rivers are the bottom of the system,” said Dave Tickner, WWF’s chief freshwater adviser. “Whatever happens on the land, it all ends up in the rivers.” For example, he said, tens of billions of tonnes of effluent are dumped in the Ganges in India every year.
As well as pollution, dams and the increasing abstraction of water damage freshwater systems. There are more than 45,000 major dams – 15m or higher – around the world. “These slice rivers up into a thousand pieces,” Tickner said, preventing the healthy flow of water. While population has risen fourfold in the last century, water use has gone up sevenfold. “We are living thirstier and thirstier lives,” he said.
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