Key Concepts
- Future generations will suffer most of the harmful effects of global climate change. Yet if the world economy grows, they will be richer than we are.
- The present generation must decide, with the help of expert advice from economists, whether to aggressively reduce the chances of future harm or to let our richer descendants largely fend for themselves.
- Economists cannot avoid making ethical choices in formulating their advice.
- Even the small chance of utter catastrophe from global warming raises special problems for ethical discussion.
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What should we do about climate change? The question is an ethical one. Science, including the science of economics, can help discover the causes and effects of climate change. It can also help work out what we can do about climate change. But what we should do is an ethical question.
Not all “should” questions are ethical. “How should you hold a golf club?” is not, for instance. The climate question is ethical, however, because any thoughtful answer must weigh conflicting interests among different people. If the world is to do something about climate change, some people—chiefly the better-off among the current generation—will have to reduce their emissions of greenhouse gases to save future generations from the possibility of a bleak existence in a hotter world. When interests conflict, “should” questions are always ethical.
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