[alexmcc81]

>they believe it will instead be a cataclysm greater than any previous mass extinction event in Earth's history.

It is already broadly accepted that we are already experiencing a massive mass extinction event - the Anthropocene Extinction.

I think critics don't really understand the scale or scope of the changes humans have made to the planet and the negative results for all other species. Global warming is just one issue, perhaps one of the most pressing, but it also blinds people to the devastation of deforestation, coral reef loss and a multiple of other man made disasters.