The world's first solar power station was built before World War One, created by a man with a vision for cleaner air. The early 1900s was an age of coal and iron. Industry was noisy and filthy, spewing the smoke from burning coal far and wide. In Philadelphia, one of the hives of industry on the Eastern Seaboard of the US, things had already become intolerable. In 1904, some 50 years before the country's Air Pollution Act of 1955, the city's administrators had created their own regulation for cleaner air .

https://www.bbc.com/future/article/20230420-the-forgotten-20th-century-sun-engine

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