"if can build a few hundred thousand wind turbines. No problem. Then you just need to add solar, hydro, and geo to the mix"
Q: Why does wind power cost five times as much as coal power?
A: Cost of the wind turbine and transmission lines (and the majority of any product cost is energy - to make the exotic materials, mine the TONS of copper for the windings, transport, produce the HUNDREDS of TONs of concrete, etc.)
Same goes with solar. A free market is a telling indicator. If wind power costs more to make, it really is less efficient. When I look at a turbine or solar panel, I don't see green gumdrops in my head, I see massive mining trucks, or giant flame tubes melting silicone.
Like electric cars? - research how much lithium there really is in the world for the batteries
Its hard to get more efficient than drilling a hole in the ground and sucking the oil out. We have made great strides in fuel efficiency and emmisions reductions...but now are Distracted with schemes that simply cannot work, to reduce harmless CO2.