Earth on course for eco 'crunch'
The planet is headed for an ecological "credit crunch", according to a report issued by conservation groups.
The document contends that our demands on natural resources overreach what the Earth can sustain by almost a third.
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"If our demands on the planet continue to increase at the same rate, by the mid-2030s we would need the equivalent of two planets to maintain our lifestyles," said WWF International director-general James Leape.