@Noahpinion The illusion might be because the city is worse for the quality of environment *that is seen by the average person*. It's better on net, but the saved green space is in areas that are "outside the picture", both here and in the minds of many residents.
@这种错觉可能是因为城市的环境质量比普通人看到的更差。网上的效果更好，但节省下来的绿地位于“图片之外”的区域，无论是在这里还是在许多居民的心目中。