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You're comparing apples and oranges.
Germany is *already* hitting its limits of land available for wind farms, and to move further with renewables it would need to occupy further thousands of km2.
And if you are indeed considering "the worst scenario" indeed, then you need to also look into possibility of mass gas explosion at power-to-gas and hydrogen processing installations that can destroy whole cities, hydro dam collapses and house fires caused by roof solars.