etking said: The climate is very complex and not understood at all, thus predictions are impossible. (Statement by the the IPCC Working Group I, if they admit that predictions are impossible, why are we talking about predicted global warming). |
you know who never lived during a warm age? homo-family species
the current ice age (a term which means that there are polar ice caps present during the whole year) has started 15 million years ago and even the earliest human precursurs we found only date back to 4.5 million years ago
so our kind and our known eco-system thrives in an ice age and a switch to a warm age is very much potentially desastrous to us, so even if CO2/human activity isn't the real culprit endagering our way of life we have lots of good evidence that it might be, so the logical consequence has to be to limit CO2 emission severely
a certain lvl of CO2 concentration (200-250ppm) seems to be necessary for earth to be warm enough (even the video you linked to earlier agrees with that!!) and not completely freeze over (obviously depending also on solar activity/earth's orbit/distribution of continents on earth/..), but we went from 290ppm to 400ppm in the span of 100 years, which is a gigantic increase in very very little time geologically speaking