Which renewable energy source would be more economically and environmentally efficient: solar or wind.

Which renewable energy source would be more economically and environmentally efficient: solar or wind.

The paper is to be written as though were presenting to the CEO of an Energy company and am providing information as to why it is economically and environmentally better to use either Wind or solar energy.

Am supposed to provide a rough outline of the paper by Thursday November 11th. My sources are supposed to be peer reviewed source.