And for the developing countries, where urban air pollution undeniably is a problem, air pollution will likewise decline when they (as we did) get sufficiently rich to stop worrying about hunger and start caring for the environment.
And for the developing countries, where urban air pollution undeniably is a problem, air pollution will likewise decline when they (as we did) get sufficiently rich to stop worrying about hunger and start caring for the environment.
至于开发中国家，城市的空气污染的确是个问题，不过一旦他们逐渐摆脱贫穷、不必再为饥饿烦恼，就会开始关心环境，我们过去也是这样，空气污染就逐渐减轻了。