A combination of renewables, storage and flexible gas are needed to create a stable and resilient energy system that provides a reliable source of electricity while transitioning away from carbon-intensive coal-fired power, marine and energy technology company Wärtsilä Energy Europe and Africa VP Kenneth Engblom has told Engineering News. “Making such smart strategy decisions will lead to more resilient electricity systems and save billions of dollars in the process,” he said in a February 3 interview.