Thank you for that excellent example. No, ocean life won't collapse in 20 years. This is not a "climate denier" statement - it's the current actual state of science.

There are however a lot of "doomist" headlines spread by activists and activist media that exaggerate - a lot - and that's indeed part of why I think young people hesitate in starting families.

(I'm of the generation that grew up thinking we'd all die due to nuclear armaggedon)