Europe’s plans to reduce carbon dioxide (CO2) emissions by switching from conventional oil to biofuels actually ended up increasing emissions, according to a study published Monday by the environmental group Transport & Environment (T&E). The study found, on average, biofuel from vegetable oil creates 80 percent more CO2 emissions than the conventional oil it replaces. The report estimates the biofuels create new emissions equivalent to putting an extra 12 million cars on the road.