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The study demonstrates that the EU can achieve domestic emission cuts of 40% by 2020 and 90% by 2050 through radical energy efficiency, a shift to renewables, and the phase-out of fossil fuels and nuclear power. It argues that such a transition is technically possible and economically bearable, costing approximately 2% of the EU's cumulative discounted GDP between 2010 and 2020. To achieve climate justice, the report asserts the EU must also provide between €150 billion and €450 billion annually by 2020 to support mitigation in developing countries.

The report presents a mitigation scenario for the EU27 to reduce greenhouse gas emissions by 40% in 2020 and 90% by 2050 relative to 1990 levels. This is achieved through radical energy efficiency, a shift to renewables, and the phase-out of fossil fuels, nuclear power, and carbon capture and storage. The analysis also estimates that Europe's fair share of international climate finance for developing nations would range between €150 billion and €450 billion by 2020.

The document argues that the EU27 must reduce greenhouse gas emissions by 40% by 2020 and nearly 90% by 2050 relative to 1990 levels to meet its climate obligations. This requires a radical transition to renewable energy, the phase-out of fossil fuels and nuclear power, and significant improvements in energy efficiency across housing, transport, and agriculture. Additionally, the EU has an international obligation to finance mitigation in developing countries, estimated at 1% to 3% of its projected 2020 GDP. The brief concludes that while the costs are considerable, they are bearable and far lower than the potential economic losses from climate inaction.