It is our "moral debt." She proposes an international 2-percent wealth tax on the ultra-rich and an increase in the global minimum corporate tax rate to fund this $500 billion transfer.

You and I may be shocked by such a suggestion but don't worry: "It's really necessary. And it's reasonable. It's not that hard." Only someone in an elite, progressive bubble could say something like that. Let's check her reasoning.

Duflo claims that climate change creates costs, specifically through "excess" deaths due to excessive heat. Poorer countries from the global south near the equator will see more days of extreme heat, and so will see a disproportionate increase in excess deaths.

Other economists translated those deaths into an externality cost of $37 per ton of CO2. Multiply that by the roughly fourteen billion tons of CO2 emitted by the US and Europe and voila, wealthy countries generate $500 billion in externality costs per year.

She proposes paying for this by increasing the global minimum corporate tax rate from 15 percent to 18 percent and introducing an international 2-percent wealth tax on the ultra-rich, which she defines as the 3000 richest billionaires. We can't go into the many problems and obstacles to such funding mechanisms here — suffice it to say such ideas will be nearly impossible to implement.