Embodied carbon emissions: construction materials.
AB 2446 is expected to influence state laws regarding environmental protection and construction standards significantly. By mandating reductions in carbon emissions associated with building materials, the bill promotes sustainability in an expanding housing market. This is particularly pertinent as California faces a housing shortage intensified by high construction costs, as well as the need to meet environmental goals. The framework proposed in the bill will establish a baseline of emissions and require builders to submit lifecycle assessments and Environmental Product Declarations for their materials, fostering transparency and accountability in reducing embodied carbon. However, exemptions exist if achieving set targets proves infeasible, addressing industry concerns over economic feasibility and supply constraints.
Assembly Bill No. 2446, known as the Embodied Carbon Emissions bill, aims to establish a framework for measuring and reducing the carbon intensity of materials used in new construction projects in California. Under the terms of the bill, the State Air Resources Board is tasked with developing this framework by July 1, 2025, in consultation with relevant stakeholders, which includes various state departments focused on housing and energy. This initiative aligns with California's ambitious goal of reducing statewide greenhouse gas emissions to at least 40% below the 1990 levels by 2030, as stipulated in the California Global Warming Solutions Act of 2006. The bill sets significant targets for the construction sector, aiming for a 40% net reduction in carbon emissions from building materials by 2035, with an interim target of 20% reduction by 2030.
The overall sentiment surrounding AB 2446 appears to be supportive among environmental advocates and legislators focused on climate change mitigation. Supporters argue that the bill aligns with California's environmental leadership and responds to urgent scientific recommendations for reducing greenhouse gas emissions. Nonetheless, some stakeholders express concern regarding potential implications for construction costs and project feasibility. Opponents might fear that stringent regulations could hinder housing development by increasing mandatory assessments and compliance requirements, thereby slowing progress in meeting housing needs in California.
Key points of contention relate to the feasibility of the targets imposed by AB 2446. Critics point out that while the intentions are laudable, the practical implications of enforcing stringent carbon reduction targets could lead to increased construction costs and project delays. The requirement for comprehensive lifecycle assessments can be burdensome for small builders and could limit the availability of affordable housing. Moreover, the bill includes provisions for a technical advisory committee to assist in navigating these changes, which indicates a recognition of the varied challenges faced by the construction sector. Balancing environmental goals with economic realities will be essential as the implementation phase unfolds.