BRUSSELS, Belgium — European Union green fuel targets will accelerate the destruction of rainforests in Southeast Asia and threaten the habitat of endangered species, such as the orangutan.

In March, E.U. leaders agreed to set a binding climate change target to make biofuel — energy sources made from plant material — account for 10% of all Europe’s transport fuels by 2020.

But the European Commission has said the objective, which aims to cut CO2 emissions, may have the unintended consequence of speeding up the destruction of tropical rainforests and peatlands in Southeast Asia — actually increasing, not reducing, global warming.

European consumption of plant based fuels will soar from around three million tons at present to more than 30 million tons in 2010, driving a boom in imports of cheap biofuels.

Europe is still years away from self-sufficiency in biofuels produced from straw and other waste vegetation. As a result, demand for cheap imports of fuels, such as palm oil, is expected to soar.

Countries such as Indonesia have already begun planning an increase in the production of palm oil, a development campaigners fear will see more rainforest fall to the axe and rare peat soil burned.

Andris Piebalgs, the European Energy Commissioner, has confirmed that despite setting the biofuel target the European Union has no system to certify that imports exclude palm oil or fuel production that has resulted in the destruction of rare natural resources.

“No mandatory certification exists at present that will guarantee that tropical rainforests or peatlands in Southeast Asia are not destroyed for the production of palm oil,” he said.

In a written response to a European Parliament question, Mr. Piebalgs went on to confess that without a scheme E.U. targets “would supplement the pressure caused by growth in palm oil use and would make an additional contribution to the pressure on tropical forests and peatlands.”

Commission declarations that it plans to develop a “sustainability” scheme, similar to one applying to the logging of tropical woods, have been greeted with skepticism.

Chris Davies, a British Liberal Democrat Euro-MP, doubts that any E.U. measures can be properly policed.

“We haven’t been able to halt the supply from rainforests of illegally felled timber so how can we have confidence that sustainability certificates would be worth the paper on which they are written?” he asked.