GW or not, we still need to be turning to renewable energy.
Oil will be lucky to see it out to the middle of this century.
Coal may last for 50 years or more perhaps (at what cost to the environment?)
Gas for a few hundred ?
But what then ? If we do not invest our "energy capital" into building renewable energy alternative's on a large enough scale, what will happen when the Non renewables go into decline & consequently rise in price ?
Global warming is happening (I believe this is an established & observable fact), are we the main cause, I don't know for sure
Do we need to do something anyhow ?
I believe the answer is yes !