solar

Solar Panels on Every Roof

So.... remember the slogans 'a chicken in every pot', 'a car in every backyard'? Well, why not "solar panels on every roof"???? Obviously in real life, these may not be possible for EVERY situation.  But why not strive for such regarding solar panels? Why not require it for every roof of either homes or businesses where it is feasible to produce electricity and hot water?