Marine biologists are concerned about the effects of untreated sewage that is flowing into coastal waters.
Accumulations of sand can be formed by the action of waves on coastal beaches.
St Lucia depends on its clean coastal waters because fishing and tourism provide much of its income.
The introduction of iron improved the effectiveness of coastal rice-growing technology.
All of these are reasonable for a large class of coastal trapped waves.
The seriously polluted advanced regions are coastal, and the lightly polluted under-developed regions are all landlocked.
