Western States Deep Decarbonization

To help states act on their climate commitments, GridLab, NRDC, PSE Healthy Energy, Evolved Energy Research, and Sierra Club developed detailed technology and policy roadmaps for three states—Colorado, Nevada, and New Mexico—to equitably meet their climate goals. The following reports include energy system modeling results, analysis of the health and equity implications of decarbonization pathways, and associated policy recommendations.

Each of the three study states has recently passed legislation or taken executive action to set pollution reduction requirements or targets. Colorado passed HB 19-1261, requiring the state to cut greenhouse gas (GHG) emissions by 26 percent by 2025, 50 percent by 2030, and 90 percent by 2050, all compared to a 2005 baseline. Nevada passed SB 254, which set goals for the state to reduce economy-wide GHG emissions by 28 percent by 2025, 45 percent by 2030, and 100 or near-100 percent by 2050, compared to 2005 levels. New Mexico Governor Lujan Grisham issued Executive Order 2019-003, which set a goal to reduce economy-wide GHG emissions by 45 percent from 2005 levels by 2030. Now, all three states are evaluating policies and pathways to meet these targets.

The following state reports detail the modeling outcomes of our analysis, as well as a series of policy recommendations for each state to equitably achieve its economy-wide climate goals.

COLORADO: This report offers a pathway for the state to meet the requirements of House Bill 19-1261, which tasks the Air Quality Control Commission with crafting and implementing a plan to reduce greenhouse gas (GHG) emissions 26 percent by 2025 and 50 percent by 2030, based on 2005 levels of emissions, with a goal of reaching 90 percent reductions by 2050.

The topline report finding is that the most cost-effective scenario to meet Colorado’s emissions reduction goals relies on generating 98 to 99 percent of electricity with renewable resources by 2030. Colorado is not on track to meet this emissions reductions target, having set a previous goal of reducing emissions from electric utilities by 80 percent by 2030. Powering the electric sector with renewable resources will make it easier to reduce emissions in other sectors such as transportation, buildings, and oil and gas production.

NEVADA: Nevada’s leaders have recognized the urgency of the climate crisis, passing a 50 percent renewable portfolio standard in 2019 and setting statewide greenhouse gas (GHG) emissions reduction goals of 28 percent below 2005 levels by 2025, 45 percent by 2030, and zero or near-zero emissions by 2050. This report describes pathways and policies to meet these goals, the equity, air pollution, and cost implications of doing so, and associated policy recommendations. Our modeling shows Nevada can meet GHG goals with energy costs similar to or even lower than today’s. Our analysis also shows that additional energy efficiency and demand flexibility can reduce the cost of the transition.

New Mexico:
Coming Soon

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