将来,人们会江少乘坐飞机的次数,对吗?为什么又how呢？我赶脚木有how才对呀how much 引导的宾语从句，做reduce的宾语不好意思，还有有点转不过弯来，用much可以吗？只是much是不行的，后面还有they travel by plane呢，你可以变成people will reduce much as they travel by plane today.