> climate change is by far the greatest threat to the environment The effects of climate change will be uneven across humanity, and many of the worst effects m

> climate change is by far the greatest threat to the environment The effects of climate change will be uneven across humanity, and many of the worst effects might be second-order (e.g. instability caused by mass migration). There are other types of environmental change, like accumulation of so-called "forever chemicals", which have the potential to have a more direct effect on the entire human population, and potentially over a shorter time period than climate change. It's not clear to me that climate change is the greatest threat we face.