I don't expect every country to do it this year, or this decade. I also don't expect every country to have nuclear power either, because it's expensive. You thi

I don't expect every country to do it this year, or this decade. I also don't expect every country to have nuclear power either, because it's expensive. You think uranium mining is clean? Constructing all that stuff is free? Of course not. The amount of solar panels needed for a house (or their share, in some solar farm) is miniscule. It's 4-7 panels. If we want to store excess for night, maybe 10. The batteries fairly small (using lithium, a sufficient battery could hang on the wall. Maybe two tesla power walls would do it). The waste isn't that bad (nowhere near the amount of waste people create yearly in plastic or other landfill garbage). It's totally doable in first world countries. And it would go a long way in developing countries too, for the same reason cell phones gained popularity faster than landlines, because they require less infrastructure.