It depends on what you mean by “disaster” and “over specified.” I will add that the IPCC, a body I accept as reputable, predicts a large range of possible outcomes with probability estimates, some of which I think can be fairly categorized as “disastrous.” Global warming is a large potential human misery-causer, but not even close to an existential threat. For certain countries, such as the US, it probably won’t be that bad, at least until the second half of this century.
It depends on what you mean by “disaster” and “over specified.” I will add that the IPCC, a body I accept as reputable, predicts a large range of possible outcomes with probability estimates, some of which I think can be fairly categorized as “disastrous.” Global warming is a large potential human misery-causer, but not even close to an existential threat. For certain countries, such as the US, it probably won’t be that bad, at least until the second half of this century.