I guess "moderately" because it's a climate change outcome that's actually debated by climate scientists, and not regarded as particular likely to happen. If i

I guess "moderately" because it's a climate change outcome that's actually debated by climate scientists, and not regarded as particular likely to happen. If it does happen it shifts man-made climate change from an unprecedented humanitarian disaster to a possible global extinction event. The last time it happened it may have wiped out 81% of marine species and 70% of terrestrial vertebrates. But, there are so many terrible consequences of climate change that are near certainties for us to waste valuable focus and mental energy being terrified of the merely hypothetical.