Air Quality Alerts, Ammo Law Overturned, Delivery Bots Expand, and Prime Day Shifts

UCLA researchers install sensors to protect Palisades residents from post-fire air pollution. A federal appeals court strikes down California’s voter-approved background checks for ammunition, citing Second Amendment rights. Food delivery robots roll out across Los Angeles, sparking debate over convenience and jobs. And despite Amazon’s extended Prime Day, shoppers turn to Walmart for better deals on everyday essentials. Four stories tracking health, law, technology, and shifting consumer habits across California.