MY anser from the book

1.Yes. Because,  if the tourists come to the world heletadge, they will learn the history and the importans of making the park clean and last forever. They will try to make the park clean by throwing the trash bin, or partisipate  in the ivent of cleaning the park. Therefor, the park will be much beautiful. As a resalt ,the amount of the tourists will rize and the world heletadge will make more money.
2,Yes.The Okayama castle park have a event of cleaning the park every month. The tourists will help to make the park clean by colecting the trash that is on the road and throwing it the trash bin.