I didn't translate it, but I found a Japanese site that lists the comments and then tells you what needs to be done.
The phrase was: 自然の多さが目立ち開拓されていない印象を受ける
Google translation of the blog: I raise the richness of life to create a facility that point life is increased. To reduce the richness of nature by reducing the trees and flowers.
Need less trees and flowers and more community projects.
Website link:
http://games.gaym.jp/3DS/egdj/environment.html