God i hate that kind of shit.
"ohh, its such a tiny amount of carbon dioxide it can' tbe doing anything bad. Also OMG someone got a little bit of radiation on them, nuclear power is bad!". cant have your cake and eat it to.
Fact is, you might be only putting 3% more carbon in, but if that's enough to cause a certain amount of climate change that is bad, then that's what's happening. Now personally i think a better way to spend money would to future proof ourselves, but that's another argument.