The front line in America’s struggle for a carbon-free future is a postage stamp of a southwestern Pennsylvania municipality — a place that has no traffic lights, no restaurants, no post office.

Almost no one in Washington County’s Jefferson Township, population 1,326, will say they oppose green energy. They’re just against the proposed 1,000-acre solar farm — the equivalent of 758 football fields — that developers want to build in an agricultural and wooded pocket featuring greeting card vistas of gravel roads and fields fragrant with new mown hay.