The thing I never quite understand about these claims is whether it is a net 25m jobs created or if an equal number of jobs will be lost in old fossil-based ind

The thing I never quite understand about these claims is whether it is a net 25m jobs created or if an equal number of jobs will be lost in old fossil-based industries. For example, if you decarbon the energy sector this presumably means coal and gas fired power stations will have to close and those employed there in turn are out of a job.