By Viviana Pruett-Saratan Staff Writer SWARTHMORE, Pa.—Local residents from across the county attended the Delaware County Office of Sustainability’s fifth annual Sustainability Conference hosted at Swarthmore College on Friday, March 13, from 8 a.m. to 3:30 p.m. About 300 people attended the full day of networking, panels, and information sessions, which included an inside look into Swarthmore College’s own sustainability initiatives and its landmark geo-exchange heating and cooling system. Becca Yurkovich, the sustainability officer for Delaware County, coordinated the event to bring together community members who share a passion for the environment. This year, Yurkovich emphasized the importance of “positive…