Anyone who thinks that Greta Thunberg and the currently hotly debated issue of environmental protection are a phenomenon of modern times is not quite right. Back in the late 1960s (and even earlier), there was a heated debate about environmental protection and the role of car emissions. GM's hybrid cars, for example, were one of the solutions at the time. The mélange of petrol and electric engines could have been a pioneering solution, had it not been for the considerable problems ...