One of the nation’s largest symbols of carbon capture technology — the Kemper project — has collapsed into a pile of debris, highlighting the strategy of one of the nation’s largest utilities as it aims to decarbonize its fleet.

The project, which was half of a multimillion-dollar power plant in Mississippi intended to gasify lignite coal and store its captured carbon emissions, was imploded by Southern Co.’s Mississippi Power unit earlier this month because the equipment was no longer needed. The facility, Plant Ratcliffe, captured worldwide attention and was supposed to host the first commercial-scale carbon capture project on a large coal plant in the United States.