Global warming or not - we are using up fossil fuels at an ever increasing rate and there is no real signs that there will be a slow down, how ever loud people shout about global warming.
Oil and gas reserves that are easy to access are being exhausted. This is why, for instance, there is pressure to drill in the Alaskan wilderness. The environmental impact and cost of ever more extreme oil and gas exploration and extraction are undeniable. We will be dependent on Russia for gas in the not too distant future - unless you think that enough can be shipped in, in tankers, to supply the whole of the UK.
So whether you "believe" in global warming or not, this situation is very worrying. We have lived with cheap energy for a long time - and as we head into old age, it is going to get much more expensive.
So making housing and businesses more energy efficient, and having an energy strategy for the country that includes renewables (and , unfortunately, probably nuclear as well) makes sense.
One of the concerns I have about "climate change denial" - note inverted commas bags is that it distracts from this imperative and supports the "it doesn't matter we can carry on burning stuff" argument