Governments have a role in taxing negative externalities. What alternative do libertarians like you have? Forgetting whether or not you believe in climate change, if it does indeed exist as a possibility, what would libertarians like you do about it?

Your comment is blatant virtue signalling -- it's taking a moral high ground without providing any alternatives.

[edit] At least you've provided an alternative now: nuclear energy. Then again, you only did it when pushed to.