Translation of vernachlässigbar

This is actually a big mistake as a community always should grow by a few percent. The reason is quite clear: The young people will need to support their parents once these are unable to work.
We had time to walk around the waterfall but refrained from entering the little lake at the bottom. My fellow tourtakers were quiet nice and we spend a while just sitting in the grass near the water.
The ship stopped in the middle of several limestone islands and passengers went swimming in the middle of the sea. There were dozens of other boats around us as the area was very touristy.