I believe that there are more people in the world today than the planet can hold at a sustainable level and going nuclear to replace fossil fuels is just postponing the problem. Uranium is also a limited resorse and we still haven´t figured out what to do with the waste but it is a short term solutuion to the CO2-problem.
A first step however would be to stop WASTING.
A third of the food we produce is lost between production and consumption because we buy it and let it get old in the fridge. Also the shop has to throw away perfectly good food because you think it went instantly poisonous at the sell by date.
Houses built when energy was cheap and unlimited have very poor insulation and waste energy and most of them will still be standing in 50 years time.
Look att a sateliteimage of the world at night. Every inhabited area is brightly lit.
This light is just shining into space as a year around christmasdecoration.