A Swiss firm is on track to solve the conundrum of where to site industrial solar farms, by turning railways into power plants.
Switzerland needs to boost solar energy output seven-fold by 2035 to meet climate goals, but a scarcity of land available for large-scale PV plants poses a serious hurdle to scaling up.
Concerns over land use, aesthetics and environmental impact have mired solar projects in controversy, with as many as a third proposed for construction in the Alps derailed by local opposition, red tape or funding woes.

