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Sunnyvale climate update: 2024 emissions spike tied to electricity supply, heavy‑duty vehicle modeling
Summary
Sunnyvale’s 2024 greenhouse‑gas inventory rose compared with 2023, the city’s environment staff told the City Council on Oct. 28, citing a temporary increase in electricity‑sector emissions from Silicon Valley Clean Energy and a state model update that raised the countywide share of diesel for medium‑ and heavy‑duty vehicles.
Sunnyvale’s environmental services staff told the City Council on Oct. 28 that the city’s 2024 greenhouse‑gas inventory rose compared with 2023, leaving the city about 12% below 1990 levels overall.
At a study session, Madeline Kerr, environmental programs manager, said the single‑year increase was driven mainly by two data issues: a temporary uptick in emissions from the city’s electricity provider, Silicon Valley Clean Energy (SVCE), and an update to the California Air Resources Board (CARB) county‑level fuel‑use model that increased the modeled share of medium‑ and heavy‑duty diesel vehicles. “We saw a 17% increase in transportation emissions,” Kerr said, and SVCE reported a non‑negligible share of electricity coming from unspecified grid sources in 2024 while it awaited new renewable…
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