I'm critical in both directions, so I don't accept all the warnings in a naive way either. I have heard some 'pro man made climate change' scientists state very questionable things just to make climate change appear more dramatic - and as a consequence I got sceptical and always ask myself: Does this scientist speak rationally about facts and observations or does he have an incentive to present things in a certain way (e.g. does he want more funds for his institute to grow, sell his own books, be part of the climate change industry...).

But on the other hand, don't overrate the size of the atmosphere. The decisive layer for our climate is only 10 miles high, and there are some examples of eruptions of a single volcano that changed the entire climate worldwide for 2 years.