The EU directive on reducing hydrocarbon emissions will require vegetable oil producers in Germany, the largest producer in the EU, to increase CO₂ emissions, which is restricted by another directive. Compliance with the hydrocarbon limit will necessitate burning more fuel, leading to higher CO₂ emissions and reduced energy efficiency in production, putting German oil refineries at risk. The proposed change in the law aims to limit emissions by half, but this will require new technology and may result in the loss of customers who prioritize environmental goals like McDonald's.