As the image above shows, energy companies in a deregulated market will built gas-fired plants to the exclusion of everything else.
In Europe, explicit policies (which specifically ensure that the sector is not subject to market prices) have made investment in renewable energy (mainly wind) happen as well, but that happen despite deregulation, via local re-regulation, and certainly not thanks to market "reforms". In the long run, we're all dead. John Maynard Keynes
