The proposed strategy met with strong opposition in Brussels. In October, the European Parliament published a resolution opposing “efforts to impose CORSIA on flights within Europe, which takes precedence over EU legislation and independence in decision-making.” France, the Netherlands, Portugal, Belgium, Austria, Finland and Norway have already threatened, independently of each other, to withdraw from the agreement if other environmental standards are further weakened. Corsia would undoubtedly weaken the ambitions of the EU`s climate policy. It is important that the EU leaves all the possibilities reserved for its own legislation in the European Economic Area (EEA). It goes without saying that the SCEA must be defined. However, if the EU were completely replaced by the UN agreement, it could lose its only instrument for reducing aviation emissions in the EEA and reduce its influence in the development of international rules in this sector. Nevertheless, it is essential for the European Union to guarantee the integrity of CORSIA if it strives to remain at the forefront of international climate policy. In 2008, the EU attempted to regulate emissions from the aviation sector under the EU Emissions Trading Scheme (ETS). The ceiling was therefore set at 95% of historical emissions between 2004 and 2006. However, flights that depart or land outside the EEA are exempt from the “Stop cable” decision until a new strategy reflecting the results of the CORSIA agreement is found. Air Traffic Black Box: Confidentiality Agreements, Closed Doors and DUCO2 Increase On February 15, 2019, ICAO announced an alternative fuels agreement to reduce compensation, but details of achieving the target of halving emissions by 2050 remain unclear. However, it was decided that even fossil fuels produced from recent oil sources or with more efficient refining processing would be eligible. It was also decided that biofuels from a large number of raw materials, including palm oil, the most likely source and one of the main causes of deforestation, can be used.
On 18 February, the European Council asked ICAO to quickly implement Corsia and “agree on a long-term goal at its next meeting in September.” For the air action group, ICAO could take three years to negotiate, until 2022.  For example, the 2020 CORSIA baseline will leave all previous emissions unregulated and is therefore not ambitious enough.