It cannot be done unless all energy use is drastically reduced. At their full potential wind and sun will only achieve 15% and that’s with a windmill or a solar panel on every inch of available land. If the enviro-dipsticks think it’s possible, they’re on a fool’s errand!
My San Diego Gas & Electric bill comes with a breakdown of our current sources of energy. Wind and solar provides about 2% or 3% at the most. How are we going to get 30%?