Age: AN EMISSIONS trading scheme is likely to increase petrol prices by about 10 cents a litre, adding pain for motorists and challenging the Reserve Bank’s goal of reining in inflation by 2010. As world oil prices continued their record-breaking run, hitting a peak of almost $US124 ($A132) on the New York futures exchange, energy experts, economists and petrol companies said motorists would pay even more at the bowser once a trading scheme began. Investment bank Goldman Sachs also …