SEATTLE (AP) — The Seattle City Council has unanimously approved changes to energy codes that will further clamp down on natural gas use in new commercial and apartment buildings taller than three stories. The Seattle Times reports the ordinance approved Monday bans natural gas for space heating in new construction of these buildings, or for use in replacement heating systems in older buildings. It also would prohibit the use of natural gas to heat water in new hotels and large apartment buildings, and take other steps to improve energy conservation that include a greater use of more efficient electric heating and cooling systems.