COLUMBUS, Ohio–(BUSINESS WIRE)–The NiSource Charitable Foundation, in partnership with NiSource operating companies Columbia Gas and NIPSCO, hosted its second annual ‘Introduce a Girl to STEAM Signature Event,’ inviting more than 300 school-aged girls to explore careers pathways in Science, Technology, Engineering, Art and Mathematics (STEAM). Aligned with the Foundation’s mission to create strong and sustainable communities where NiSource employees and customers live and work, this program a