Nearly 20 environmental justice groups have urged California regulators to tighten diesel emissions standards amid a rapid expansion of data centers in the state. The groups say that the current air pollution standards are insufficient to protect communities near new facilities. California has seen a surge in data center construction, driven by demand for cloud computing and artificial intelligence services. The industry's growth has raised concerns about diesel-powered backup generators and their impact on local air quality. In a statement, the coalition of groups highlighted that the existing regulations do not adequately address the emissions from diesel generators that are commonly used in data centers. They called for stricter limits that would align with the state's broader climate goals. Regulators may consider revising diesel emission limits to reduce the environmental footprint of data centers, potentially improving air quality for nearby residents and supporting California's climate commitments.