The reduction in emissions of carbon dioxide per new unit of non-hydro «renewable» capacity falls off
rapidly as additional «renewable» capacity is added to an electric grid because additional fossil
fuel sources must be kept in «spinning reserve» in case the wind dies or the sun goes under a cloud unless hydro is
available.
As I am aware, the alternatives under consideration are: a) either to cut anthropogenic CO2 emissions
rapidly according to the Paris agreement in order to «transit away from fossile
fuels», or b) to replace fossile
fuels — in accordance with Eija - Riitta Korhola — by developing methods to replace energy from fossile
fuels still
available by using other energy sources
available when that is profitable, or when fossile
fuels are finishing.