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In order to reduce air pollution, many countries have been requiring the use of oxygenated fuels. Other oxygenates exist but an at least 10% ethanol blend is preferred because it improves air quality without risking water contamination and produces far lower greenhouse gas net emissions than gasoline to combat global warming.
There is a directive to blend ethanol in motor fuel at a ratio of 3.5% ethanol to 96.5% gasoline. This directive 2003/30/EC is effective until 2010 when it is mandated that the blend be 5.75% (by energy value), which equates to approximately an 8% ethanol blend by volume.
There is set up the binding objective of the share of biofuels in the traffic sector in the amount of 10% till the year 2020, the minimal saving limit of the production of the greenhouse gases is set up in the amount of 35% in the whole process of producing the biofuels (well-to-wheel).
For the particular parts of the biofuels life cycle will be set up two grades, the "typical" grade and the "default" grade, whereas non-fulfilment of the certification obligation from the producer side will have the consequence in application of the "default" grade.
In the case, when the minimal saving limit of the greenhouse gases is not fulfilled, the certain commodity will be separate out of the volume of the fulfilment goal of EU in a certain member country.
The Czech Republic has legislation pending for mandating a blend of 2% ethanol (by volume) by January 1, 2008; by January 1, 2009 the blend must be at a rate of 3.5% (by volume).