Right, solar on building roofs is fine and good, it's not nothing, but it's not a serious way to grow renewable energy. It's thinking far too small-scale. If t

Right, solar on building roofs is fine and good, it's not nothing, but it's not a serious way to grow renewable energy. It's thinking far too small-scale. If the grid is fully modernized and using 99% renewables, there are very few reasons to want photovoltaic panels on cars. So you focus on what's cheap and scalable.