All but one of the at-large candidates for Boston’s City Council convened at the Boston Public Library Wednesday night for a forum in which city residents pressed the contenders on their stances on energy and environmental issues.

Since nomination applications opened two weeks ago, more than 50 Boston residents have applied to become candidates in the 2019 Boston City Council elections, according to WBUR, hoping to be chosen by voters to fill one of 13 open seats in November.