There's some good answers to those questions here: http://www.withouthotair.com/ http://www.withouthotair.com/ I'm optimistic about renewables. Photovoltaic so

There's some good answers to those questions here: http://www.withouthotair.com/ http://www.withouthotair.com/ I'm optimistic about renewables. Photovoltaic solar is already cheaper than retail power and competitive with wholesale in many markets. The issue now is grid storage. Battery tech is currently improving at around 7% a year, so I think we'll see electric cars go mainstream in the next 5 years and decreasing reliance on centralized power generation shortly afterwards.