Here on planet Earth, things could be going better. The rise in atmospheric temperatures from greenhouse gases poses the most dire threat to humanity, measured on a scale of potential suffering, since Imperial Japan and Nazi Germany launched near-simultaneous wars of conquest. And the problem has turned out to be much harder to solve. It’s not the money. The cost of transitioning away from fossil fuels, measured as a share of the economy, may amount to a fraction of the cost of defeating the Axis powers.
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