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• Under baseline assumptions, decarbonization would yield $41 billion in net benefits to Costa Rica between 2020 and 2050, using a 5 percent discount rate.
• Under all but 22 of the more than 3,000 plausible futures considered, implementation of the decarbonization plan would lead to economic benefits that exceed the costs.
• Currently, electricity is almost completely renewable, and with modest investments it would provide nearly emissions-free energy to support the electrification of much of Costa Rica's economy.
• In the transport sector, significant emissions reductions are possible through electrification of transport and shifting to public transportation. The economic benefits from energy savings, fewer accidents, time saved from reduced congestion, and the reduced negative impacts of air pollution on health more than compensate for the initially higher up-front costs of switching to electric vehicles and building infrastructure for zero-emissions public transport.
• Reducing emissions in agriculture and livestock could lead to increased productivity, and increasing carbon sequestration by forests would increase valuable ecosystem services, such as renewable forestry products, water and soil benefits, and support for tourism and cultural heritage.
• Emissions reductions from buildings, industry, and the waste sector are also important to reach zero net emissions and together provide modest net benefits through energy cost savings, increased productivity, and the value of treating and recycling and reusing liquid and solid waste.

Costa Rica's National Decarbonization Plan (NDP) sets the ambitious goal for the country to become carbon-neutral by 2050 and lays out a wide range of policy and institutional reforms to achieve this goal. The authors of this report developed an integrated model that estimates the benefits and costs of implementing the NDP in all major sectors, informed by consultations with numerous government agencies, industries, and nongovernmental organizations, and used it to evaluate whether the NDP makes economic sense for Costa Rica — that is, whether the benefits of the NDP exceed its costs.

The authors' analysis suggests that under the vast majority of plausible assumptions about the future, the NDP would achieve or nearly achieve its greenhouse gas emissions reduction goals and do so at a net economic benefit. Conversely, without a concerted focus and investment in decarbonization, Costa Rica's greenhouse gas emissions will increase substantially.

The findings from this study can play an important role in ensuring that the implementation of the NDP is robust — meaning that it will achieve its goals in the uncertain future. This analysis confirms which lines of action are most critical to the success of the NDP — transport and land use — and identifies some key conditions necessary to achieve close to zero net emissions at a large net economic benefit. This study also offers ideas and models that are valuable for other countries interested in decarbonization, and that can inspire development partners globally.

• Chapter One

  Costa Rica's Ambitious Plan to Decarbonize by 2050

• Chapter Two

  Approach for Analyzing the Benefits and Costs of Costa Rica's Decarbonization Plan Under Uncertainty

• Chapter Three

  The Benefits and Costs of Costa Rica's Decarbonization Plan Under Standard Assumptions

• Chapter Four

  How Uncertain Is the Success of Costa Rica's Decarbonization Plan?

• Chapter Five

  Advancing Decarbonization in Costa Rica