So far the replacement of coal with unsubsidized natural gas has reduced carbon emissions by a much larger fraction than all the subsidized wind and solar power installed to date - at least in the US. This is a phenomenon that is spreading world wide, and its effects will be large.
Climate change is real - it has been going on for millions of years. What's happening now is indeed partly caused by man made GHG, however the warming so far seen is far less than the various forecasts of the IPCC. Indeed the IPCC has only gotten around to including the accelerated growth of green plants and more realistic estimates of the depth of the ocean mixing areas for carbonic acids in just the last few years. Their earlier assumptions were a bit breathtaking in their self-serving amateurism, and the continuing divergence of actual warming with their earlier estimates was becoming an embarrassment.
The British and Germans have shut down a large fraction of their nuclear plants in the last eight years in response to naïve political pressures. Coal generated power amounted to a large fraction of their replacements.
The welfare of the ~7 billion human beings inhabiting this planet often appears to not figure in the calculations and recommendations of dedicated environmentalists. Even with recent improvements, current wind and solar technologies cannot provide a solution without other large sources of power.
New fracking and directional drilling technologies have vastly increased the worldwide store of recoverable natural gas, and that has already done as much or more to contain CO2 emission growth as have wind and solar.
Nuclear power can now, and likely will continue, to provide a major source, despite the prejudices of environmentalists in Europe (and recently the U.S.) . Current pressurized water reactors are safe and reliable. The new generation of PWR plants promises even more.
Emerging new technologies, such as solar powered synthesis of free hydrogen, may soon provide new sources of practical, storable fuel for conventional engines that produce only water vapor (ironically also a GHG) when burned. That and small new generation nuclear plants could be transformative.