Wind energy and solar energy are the twin standard bearers of the renewable energy movement. They are both in abundant supply and produce no greenhouse gases once installed, leading to better air quality and paving the way to curbing global warming. They are also more affordable now in most places than fossil fuels, which are subject to highly volatile price shifts. Wind and solar are superior to oil and coal in almost every single way, but how do they stack up to each other? While both are...
