Oh. Well, those also have resource constraints (hazardous and rare materials used in solar panels, batteries for both if that is method of storage), storage constraints (saving energy for when the sun isn’t shining and the wind isn’t blowing), economic constraints (still more expensive than burning coal and oil) and political constraints (people don’t want solar panels or wind turbines in their backyard + political will to stand up against oil and to offer incentives that make solar/wind financially viable).

Same themes as the challenges to nuclear.