(BBC News) Global wildlife populations have fallen by 58% since 1970, a report says.
The Living Planet assessment, by the Zoological Society of London (ZSL) and WWF, suggests that if the trend continues that decline could reach two-thirds among vertebrates by 2020.
The figures suggest that animals living in lakes, rivers and wetlands are suffering the biggest losses.
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Human activity, including habitat loss, wildlife trade, pollution and climate change, is attributed to the declines.