cities to ban natural gas. now they are pushing for laws across the country. a recording of the leadership call obtained by a watchdog group reveals the strategy. home builders, laborers and agriculture farmers specifically are the more effective voices for us. we have used them to testify in cases in front of the legislatures as well as at city councils. reporter: tucson s mayor, re jeagina romero says breaking st law is costly. they could retain our state shared sales taxes. for the city of tucson that would be a $130 million hit. reporter: nearly two dozen republican-controlled states have passed laws forbidding natural gas bans. residential and commercial greenhouse gas emissions from heating and stove tops made up 13% of total u.s. emissions in 2019. when you have state