The problem is there are clear tipping points - where one extra ton could trigger outsized negative outcomes. And worse, one tipping point could trigger many ot

The problem is there are clear tipping points - where one extra ton could trigger outsized negative outcomes. And worse, one tipping point could trigger many others. Scientists just don't know when they will trigger. For example, the loss of sheet ice. And bleaching events themselves in the reefs too I suspect would fall in this category. Some research here in case you're interested: https://science.sciencemag.org/content/362/6421/1379 https://science.sciencemag.org/content/362/6421/1379