This question is very similar to Q3 about conflicts. Again, we have used the Lake District as a good example.

Popular walking areas suffer from erosion.
Mountain bikes and horses spoil the landscape by churning up the grass into mud.
Speed boats give off noise pollution which annoys other boaters and tourists.
Cars cause traffic jams at popular times and make air pollution.
There are not enough parking spaces for cars so they have to park in the road and on grass.

Tourists park in front of farmers gates - blocking the farmers entrance.