All of them, as almost all developed nations can now build nuclear, for example. It just requires not being reliant on fossil fuel. Which would have been easy t

All of them, as almost all developed nations can now build nuclear, for example. It just requires not being reliant on fossil fuel. Which would have been easy to avoid had the process started earlier. The first mistake was being reliant on gas for energy. The second mistake was that it was Russian gas. It’s the first mistake that should have been avoided, not the second.