On microplastics I agree, but on climate change the issue is almost reversed. We have tons of high profile research coming out all the time that even our worst case models were too optimistic and we are bound for a shitshow of unimaginable proportions. This shouldn't come as a surprise for people who know how the IPCC reports are created (sort of a least common denominator between science, politics and lobbyists). So every time they say official "worst case" model, that is the worst case that the fossil industry is willing to admit. And that is already pretty bad. What we're actually going to experience could very well amount to a civilisation-ending event. Especially if oceans keep acidifying, which is a highly overlooked doomsday gun and could not just end modern civilisation, but actually kill us and most other land based oxygen breathing creatures. We even know this has happened once already, most likely from a combination of impact events and volcanism. But today's CO2 emission rate is an order of magnitude greater than it was back then.
https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extin...