The government has, in line with the Paris Agreement (2015), set targets to achieve, over time, a fully CO2-neutral energy supply. Significant efforts need to be undertaken in many areas if we are to see real progress. For not all measures or choices are equally cost-effective nor do they have the same effect on CO2 emissions. And some choices seem to be illogical – using more natural gas, a fossil fuel, to reduce emissions is met with incredulity by some groups. Can that be right?