A possible weakening of the EU rules for car fleet limits for CO₂ could lead to significantly higher fuel prices and a burden on the emissions trading system. On Monday, the head of the EU Commission, Ursula von der Leyen, proposed extending compliance with the limits from one to three years – a measure that could lead to around 50 million tons more CO₂ emissions, according to calculations by the International Council on Clean Transportation ICCT think tank. And if the action plan announced for March 5 by the EU Commissioner for Sustainable Transport, Apostolos Tzitzikostas, ensures that more cars with combustion engines are put on the market, this could lead to higher prices for petrol and diesel due to a shortage of CO₂ certificates in ETS 2. This would result in a burden for consumers and possibly pressure to water down the rules of ETS 2.