City outlines carbon‑neutrality options and costs; committee debates offsets versus direct reductions

Jonathan Obenschein, assistant director for climate action (S5), presented approaches the city has considered to achieve carbon neutrality by 2030. He said the city would prioritize direct emissions reductions where possible and offset the remainder. "Our best estimates...is that about 272,000 metric tons per year would need to be offset to achieve carbon neutrality by 2030 depending on direct reductions," Obenschein said, and he provided preliminary portfolio cost estimates: high‑quality offsets the city currently purchases cost roughly $8–$12 per ton, and covering community vehicle emissions with low‑cost offsets would be on the order of $2.1 million to $3.1 million annually.

Obenschein summarized working‑group feedback noting concerns that purchasing offsets could reduce urgency for direct emissions reductions, and that a voluntary program faces administrative overhead and uncertain uptake. He said local options — such as expanding urban canopy or pilot carbon‑removal projects — appear unlikely at scale but have local co‑benefits. Staff proposed focusing near term on municipal neutrality and exploring a voluntary community program rather than pursuing a city‑funded community‑wide offsets program without a clear revenue source.

Committee members debated the tradeoffs. One member urged considering voluntary participation by residents and businesses, pointing to Palo Alto’s prior "green program" participation as evidence of community interest. Another member argued for leading public materials with an apples‑to‑apples comparison of emissions to avoid misinterpretation of methodology changes. The working group largely leaned against mandating a paid program, but members supported further study of voluntary approaches and surveying likely participant rates before committing staff resources.

Public comment (S9) suggested measuring scope‑3 effects from the city’s low‑carbon concrete requirement and whether that program could contribute to a local offset portfolio.

What happens next: staff asked the committee whether to continue exploring voluntary programs and municipal neutrality and to return with more detailed modeling on projected 2030 emissions, potential survey data on uptake, and refined cost estimates.