The biofuels bonanza will crash unless producers can guarantee their crops
have been produced responsibly, the UN's environment agency chief has said.
Achim Steiner of the UN Environment Programme (Unep) said there was an urgent
need for standards to make sure rainforests weren't being destroyed.
Biofuel makers also had to show their products did not produce more CO2 than
they negated, he told BBC News.
Critics say biofuels will lead to food shortages and destroy rainforests.
They point to the destruction of Indonesia's peat swamps as an example of
The swamps are one the richest stores of carbon on the planet and they are being
burned to produce palm oil.
Mr Steiner implied that because of Indonesia's inability to police its land use,
biofuels from palm oil grown by the nation might never be deemed to be
But he said some biofuels could be ...