That's a good point regarding scientific claims about the future, thanks. You are right that the future of a complex system is impossible to predict precisely, and maybe that's often misleadingly communicated.
I think in terms of negative consequences, though, the effects of anthropogenic climate change are already here in the present. Although it is scientifically debated to what extent one can attribute single weather extremes to co2 emissions, it's not really disputed that today's climate, which is already severely impacting humans negatively, is due to past human emissions.
Basically: it's already happening right now, and to identify the mechanisms responsible for the present climate does not require belief that goes beyond other scientific insights that are otherwise widely accepted.
I think in terms of negative consequences, though, the effects of anthropogenic climate change are already here in the present. Although it is scientifically debated to what extent one can attribute single weather extremes to co2 emissions, it's not really disputed that today's climate, which is already severely impacting humans negatively, is due to past human emissions.
Basically: it's already happening right now, and to identify the mechanisms responsible for the present climate does not require belief that goes beyond other scientific insights that are otherwise widely accepted.