The opposition appeared overwhelming: Tens of thousands of emails poured into Southern California’s top air pollution authority as its board weighed a June proposal to phase out gas-powered appliances. But in reality, many of the messages that may have swayed the powerful regulatory agency to scrap the plan were generated by a platform that is powered by artificial intelligence.

Public records requests reviewed by The Times and corroborated by staff members at the South Coast Air Quality Management District confirm that more than 20,000 public comments submitted in opposition to last year’s proposal were generated by a Washington, D.C.-based company called CiviClick, which bills itself as “the first and best AI-powered grassroots advocacy platform.”

A Southern California-based public affairs consultant, Matt Klink, has taken credit for using CiviClick to wage the opposition campaign, including in a sponsored article on the website Campaigns and Elections. The campaign “left the staff of the Southern California Air Quality Management District (SCAQMD) reeling,” the article says.