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What invention revolutionized the beer industry and also contributed to the roadside trash pickup industry? (This should be easy)

That didn't take any time to get that done. The funny thing about the French scientist Louis is that his work was ignored in France, but the Germans and the Brits followed his advice, and their beer dramatically improved - soon even the French were pasteurizing their beers.

This French scientist was dedicated to the improvement of beer but is better known for something else. Who is he, and what is he famous for?