It's becasue human populations are concentrated in areas that are lacking proper resources.
In order for the Earth to get larger, more mass would have to be added. Since no new mass is added in the process, It's size doesn't increase.
Answer:
The Europeans brought many diseases with them that decimated Native American populations. Colonists and Native Americans alike looked to new plants as possible medicinal resources.
This question is true as well for more help leave a comment on my page and ill get back to you!
