I don’t think that libertarianism is a suicide pact. Sure, if the costs of climate change are minimal many libertarians won’t accept legislation limiting their

I don’t think that libertarianism is a suicide pact. Sure, if the costs of climate change are minimal many libertarians won’t accept legislation limiting their freedom but I’m pretty sure that position changes as soon as a somewhat large amount of loss of life is predicted. Your second paragraph challenges assumption three: “The costs of climate change are lower than the costs of preventing or slowing down climate change.” It’s consequently no wonder that you disagree with the policy – pretty much anyone who disagrees with assumption three can be expected to be against this legislation, independent of her or his other political views. You are basically saying that the costs of slowing or stopping climate change will be infinite (it will be impossible) or at least extremely high, at any rate higher than the costs of climate change itself.