After making a show of deference to Donald Trump in the wake of deadly Los Angeles County wildfires earlier this year, Gov. Gavin Newsom appears to be back to challenging the federal government on climate change policies. Newsom announced Friday that his administration will launch satellite-mounted sensors to track emissions of methane, an odorless gas pollutant that is a major contribution to global warming, making good on a promise originally made by former Gov. Jerry Brown.