Is there a case for the EU to move beyond 20% GHG emissions reduction by 2020?

The study uses the Imaclim-R model to analyze the economic trade-offs of EU emissions targets. It finds that a -20% target by 2020 may lead to prohibitive costs and negative GDP growth between 2040 and 2050 due to technological inertia and 'lock-in' of carbon-intensive infrastructure. While a more ambitious -30% target can reduce long-term risks and provide energy security co-benefits—especially in oil-constrained scenarios—it may impose significant short-term macroeconomic costs. The authors argue that carbon pricing alone is insufficient for 'inert' sectors like transport and residential buildings, recommending complementary sectoral policies, such as passenger car mobility reduction, to lower overall costs and avoid industrial decline.

• A 2020 target of -20% emissions reduction is relatively easy to achieve in the short term but creates a risk of economic instability in the long term, potentially leading to negative European GDP growth between 2040 and 2050.
• The difficulty of reaching the 2050 target after a moderate 2020 target is driven by technological inertia in capital and infrastructure, as well as imperfect foresight by economic agents regarding future carbon prices.
• Increasing the 2020 target to -30% can act as a hedge against oil price volatility, providing economic co-benefits by reducing tensions on oil markets, particularly in scenarios where oil production is strongly constrained.
• The economic impact of a -30% target varies by oil supply assumptions: in a world with less constrained oil production, the short-term GDP loss is significantly higher (up to 6%) compared to a world with strong constraints.
• Carbon pricing alone is an inefficient tool for decarbonizing 'inert' sectors such as transportation and residential buildings, which respond weakly to price signals.
• Combining a -30% target with specific transport policies—such as shifting infrastructure investment from roads to rail/water and reducing car-dependency—lowers the macroeconomic cost compared to using carbon pricing alone.
• Long-term transport emissions may experience a 'rebound' effect due to increased mobility from higher GDP and a modal shift toward air transport, even with stringent targets and specific transport policies.

APA

Guivarch, C., & Rozenberg, J. (2011). Is there a case for the EU to move beyond 20% GHG emissions reduction by 2020? Climate Strategies. https://climatestrategies.org/wp-content/uploads/2014/11/cs-eu-beyond-20-cired-pathways-final.pdf

Chicago

Guivarch, Céline, and Julie Rozenberg. Is there a case for the EU to move beyond 20% GHG emissions reduction by 2020? Climate Strategies, 2011. https://climatestrategies.org/wp-content/uploads/2014/11/cs-eu-beyond-20-cired-pathways-final.pdf.

Wikipedia

{{cite report |last1=Guivarch |first1=Céline |last2=Rozenberg |first2=Julie |title=Is there a case for the EU to move beyond 20% GHG emissions reduction by 2020? |publisher=Climate Strategies |date=February 2011 |url=https://climatestrategies.org/wp-content/uploads/2014/11/cs-eu-beyond-20-cired-pathways-final.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{guivarch2011there, author = {Guivarch, Céline and Rozenberg, Julie}, title = {{Is there a case for the EU to move beyond 20\% GHG emissions reduction by 2020?}}, institution = {Climate Strategies}, year = {2011}, month = feb, url = {https://climatestrategies.org/wp-content/uploads/2014/11/cs-eu-beyond-20-cired-pathways-final.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }