Despite some last-minute reservations, the Mountain View City Council on Tuesday unanimously gave final approval to a broad set of new building codes that ban the use of natural gas in all types of new home construction. The building codes, updated as part of a routine three-year process, require that all housing — from single-family homes and duplexes to condos and apartment complexes — must be all-electric. Starting January 2020, the city will prohibit natural gas hookups for heating and cooling systems, water heaters, clothes dryers, stoves and fireplaces. Prior to the final approval this week, the council had voted 7-0 on Oct. 22 to back the strict new requirements, which several members argued are essential to battle climate change and reduce greenhouse gas emissions. City staff had initially recommended that single-family homes and duplexes could continue to use gas for cooking appliances and fireplaces. Councilman John McAlister said he was concerned that the council was potentially overstepping and “intruding on peoples’ lives” by banning gas for cooking appliances. What’s more, he said, he worried about the “unintended consequen...