Conservatives and most media in Korea are against the phase out of nuclear energy in Korea. They state that it will result in higher energy costs, make it harder to become carbon neutral, and that advanced countries are pursuing nuclear energy.
And they are getting a significant portion of the population to agree with them. A lot of cognitively dissonant people.
You can drive across Korea in 4-5 hours. If there is a nuclear accident, then 10-20% of Korea might become uninhabitable.
Also, when a nuclear plant or waste disposal site is proposed, EVERYONE is vehemently 'not in my neighborhood'.
