If extra money is not found to tackle climate change, bail-outs could be a "waste of money", UN head of environment warns.

The UN's head of environment has been left "stunned" by the billions of dollars pumped into ailing companies following the global financial crisis.
Achim Steiner told the BBC One Planet programme that he had fought for years to secure much smaller sums to tackle poverty and climate change.
"We waited perhaps a decade to get $5bn ($3.3bn) to accelerate development of renewable energy," he said.
We now see $20bn (£13.3bn) paid [to] a car company simply to keep it alive."
He said he was surprised that such huge amounts had "suddenly been found" to tackle the crisis.
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