In future, German motorists will also be able to fill up their tanks with diesel fuel made 100% from waste materials such as cooking oil from restaurant deep fryers, under a new law approved on Friday. The Bundesrat, the upper house of Germany’s parliament, signed off on the measure that paves the way for the introduction of biodiesel fuels on the German commercial market. Paraffinic diesel fuels, which are produced from waste materials and vegetable oils, will now be allowed to be sold as pure fuels. Until now, they could only be blended with conventional diesel. Since biodiesel produces less…