I like human development, equality etc, but :) the environment relationship seems rather non-monotonic to me, curious if there's a solid argument for reducing inequality being a general positive for the environment and not just a progressive feel-good bundle package?

For variables such as fertilizer usage there’s an inverted U-shape of environmental impact—little when people are poor, a lot when they start getting wealthier, little in highly developed countries with better technologies, better crops etc.>