I have been an opponent of nuclear power because of the higher base load cost. You can not rapidly shut down a nuke and cost per KWH is higher than most other sources- except for those nuke plants that have been built and then sold for less that cost.
The best way to stop CO2 emissions is if everybody and every animal stopped breathing. Have you read up on iron fertilization on Wikipedia? A friend studied under John Martin and was involved in the SOFEX experiments. The interesting thing is that after working in the field of CO2 emissions for 20+ years, he does not feel that this is major cause of climate change, IF man is causing it.