"Students who acquire large debts putting themselves through school are unlikely to think about changing society. When you trap people in a system of debt, they can't afford the time to think."
"As for geoengineering, there have been serious general critiques that I think cannot be ignored, like Clive Hamilton's, along with many positive assessments. It is not a matter for subjective judgment based on guesswork and intuition. Rather, these are matters that have to be considered seriously, relying on the best scientific understanding available, without abandoning sensible precautionary principles."
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