A squat power plant with smokestacks may not be what environmentally conscious investors have in mind when they go looking for stocks. Yet electric utilities are at the center of a seismic shift away from coal and toward wind and solar power over the next 15 years. That is expected to be a huge boon to both the environment and investors—and utility company stocks and funds are a cheap way to plug into this critically important transition.
By the next decade, clean power sources such as wind and solar are projected to provide…
