Re various posts about CO2 emissions: in some EU countries Renewable electricity is getting high penetration e.g. Ireland, Germany, Denmark, UK (still EU for now 😉). France dominated by nuclear i.e. Low CO2 intensity. The EU targets for emissions reduction are most likely to be met in power sector.
Transport is more problematic but progress is being made, e.g. EVs, HEVs, PHEVs, fuel cells, electric trains (and of course all EVs then rely on the power sector). HGVs will likely need biogas, fuel cells or some combination to reduce emissions.
But it is space heating where the biggest challenges lie, e.g. In Ireland where targets are being missed. Energy system modelling for least-cost solutions to 2050 and with CO2 emissions constrained to zero show electrification of as many systems as possible, e.g. Incl heat pumps for heating and cooling, are the way to go.
All of which fails to address agriculture, especially meat production. So in Ireland, we could in theory meet all our Energy needs from domestic Renewable energy sources and get to zero emissions. But we'd have to shoot every cow in the country and say bye-bye to our meat and dairy industries. Hobson's choice..