The quality of fuels used in transport is regulated by the Directive 2009/30/EC amending Directive 98/70/EC as regards the specification of petrol, diesel and gas-oil and introducing a mechanism to monitor and reduce greenhouse gas emissions. By the end of 2020, suppliers should gradually reduce life cycle greenhouse gas emissions by up to 10% per unit of energy from fuel and energy supplied, this reduction amounting to at least 6 % by the end of 2020 compared to the EU-average life cycle greenhouse gas emissions per unit of energy from fossil fuels in 2010, obtained through the use of biofuels, alternative fuels and reductions in flaring and venting at production sites.