Policies such as the Fuel Quality Directive from the European Union designate some oil sources as excessively carbon-intense in comparison with other fuels. Likewise, California's Low Carbon Fuel Standards seek to reduce carbon intensity in transportation fuels.

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policies such as the fuel quality directive from the european union designate some oil sources as excessively carbon-intense in comparison with other fuels. likewise, california's low carbon fuel standards seek to reduce carbon intensity in transportation fuels.