> But at a national level the data is compelling. I'm convinced by the Environmental Kuznets Curve.

Which data do you find compelling?

For people who don't know the Environmental Kuznets Curve is basically the hypothesis that as economies grow past a certain they naturally start to cause less environmental damage.

As far as I can tell the main empirical evidence in favour of this is the fact that some western countries have managed to maintain economic growth whilst making reductions to their carbon emissions. This has, of course, partially been driven by offshoring especially polluting industries, but also as a result of technological developments like renewable energy, and BEVs.

On the other hand, taking a global sample it's still rather clear that there's a strong correlation between wealth and carbon emissions, both at the individual scale and at the level of countries.

It's also clear that a lot of the gains that have been made in, say, Europe have been low-hanging fruit that won't be easy to repeat. For example migrating off coal power has a huge impact, but going from there to a fully clean grid is a larger challenge.

We also know that there are a bunch of behaviours that come with wealth which have a disproportionately negative effect on the environment. For example, rich people (globally) consume more meat, and take more flights. Those are both problems without clear solutions.

(FWIW I agree that solar power is somewhat regressive, but just for the normal "Vimes Boots Theory" reasons that anyone who is able to install solar will save money in the medium term. That requires the capital for the equipment — which is rapidly getting cheaper — but also the ability to own land or a house to install the equipment on. The latter favours the already well off. There are similar problems with electric cars having higher upfront costs but lower running costs. The correct solution is not to discourage people from using things, but to take the cost of being poor into account in other areas of public policy).