A health care labor union in California submitted more than 1.5 million signatures this week to place a billionaire tax on the November ballot. Reporter: Izzy Bloom, KQED It’s been two months since the war in Iran began, and the resulting energy crisis has made the cost of driving a major concern here for millions of Californians. In a state where people rely heavily on cars, the rising costs are forcing some drivers to make financial sacrifices, with some giving up the car altogether. Reporter: Azul Dahlstrom-Eckman, KQED Learn more about your ad choices. Visit megaphone.fm/adchoices

Today in Oakland, two of the most powerful men in tech are set to face off in a federal courtroom. Elon Musk, the world’s richest man, is suing Sam Altman, the CEO of OpenAI. Reporter: Rachael Myrow, KQED State courts will start tracking and reporting on immigration arrests at their facilities, starting in June. That’s after the policymaking body for California courts approved a new rule Friday. Reporter: Farida Jhabvala Romero, KQED It’s spring cleaning season, and that can involve wiping off something most of us may not otherwise notice: dust. But for researchers at UC Merced and throughout California, dust is much more top of mind. These particles, they say, affect many parts of life and not just our health. Reporter: Rachel Livinal Learn more about your ad choices. Visit megaphone.fm/adchoices

Courthouse arrests by ICE have been ramping up across California, particularly in the Inland Empire where court raids have become almost a daily occurrence. In response, two state senators have introduced bills in the California Legislature that aim to curb raids at courthouses. Reporter: Anthony Victoria, KVCR Learn more about your ad choices. Visit megaphone.fm/adchoices

For many Californians, mobile home parks are one of the last real affordable paths to homeownership. Residents typically own their homes, but rent the land beneath them. In recent years corporate investors have sought to buy this land and in some cases seek to maximize profit. But this arrangement can leave homeowners vulnerable. The California Report’s Madi Bolaños has spent the last two years looking into one of these companies, Harmony Communities. Many of its residents say they’ve been dealing with unfair rent increases and fear eviction. These tensions are unfolding in a quiet mobile home park in the Bay Area city of San Pablo. Reporter: Madi Bolanos, KQED Learn more about your ad choices. Visit megaphone.fm/adchoices

The policy-making body that oversees California's court system plans to vote on a proposal this Friday that would require courts to collect data on civil arrests inside the state's courthouses. It comes amid a rise in arrests by federal immigration agents of undocumented people inside and near courthouse across the state and throughout the U.S. California counties will be able to continue dedicating the bulk of their federal homelessness funds towards permanent housing. That’s because a move by the Trump administration to shift funding priorities towards temporary and sober housing is now on hold following a legal victory this week. Reporter: Marisa Kendall, CalMatters A program incentivizing large ships to slow along the state’s coastline when whales are present goes into effect statewide today Reporter: Danielle Venton, KQED Learn more about your ad choices. Visit megaphone.fm/adchoices