No activity affects more of the earth's surface than farming.

问题描述:

No activity affects more of the earth's surface than farming.
more of 怎么理解
than是比较级还是 除了的意思?

没有什么比农耕对地表损害更大的人为活动了
affects more of 对xx影响更大
than是比较的意思,和农耕相比