Domestic energy is taxed (5% VAT, same as tampons) regardless of the source. The question is whether cheap fossil fuels should be taxed to promote higher cost renewables and load the cost onto the consumer, renewables should be subsidised to push costs onto the taxpayer, or neither.
Pushing the cost onto the consumer is unpopular, remember the fuss about higher energy costs and Ed Milliband's pledge to cap prices - all now died down because costs have fallen due to lower fossil fuel prices. This does at least encourage lower usage.
Pushing the cost on the taxpayer is bonkers because it does not effect behaviour and usage and is not paid by those who use more energy.
In a closed economy, either of these solutions would work because they would encourage the use of renewables and reduce fossil fuels.
However, we do not live in a closed economy and one of the reasons our manufacturing industry is smaller and suffering is because energy is cheaper abroad, using coal fired power stations - all we are doing is exporting our pollution, mainly onto poorer people who suffer more.
As far as precaution is concerned, I agree with this, but the anti-frackers have gone too far. Nothing is totally safe, 20 people a year die falling out of bed, 2,500 left-handed people die a year using right-handed products.
Fracking has not killed anyone and there is no statistically significanty evidence of anyone harmed by fracking, despite many reports saying it may be dangerous to health. The USA has very kindly set-up a real life experiment and, with some tweaks to the rules about storage and disposal of water used, shown that it is safe for the benefits it provides.
Fracking has also enabled the USA to become a net exporter of oil (or would if it was allowed) which will reduce money going to the middle east and arming the delightful people who live there.
As far as co2 is concerned, there is still much debate about what the impact of a warmer world will be and whether it is a net benefit/harm to the UK and the rest of the world.
Overall, I believe that the benefits strongly outweigh any negatives and scare-mongering does a disservice to proper debate.