I know rooftop solar is not the grand solution, it's just a little piece. We would indeed have to build out solar & wind farms of appreciable size. But I canno

I know rooftop solar is not the grand solution, it's just a little piece. We would indeed have to build out solar & wind farms of appreciable size. But I cannot fathom how the entire total global roof area can only power 8% of Poland. Evidence?