https://ift.tt/wEcZxH foam is said to be caused by pollutants in sewage mixing with sea water and frothed by waves.
from BBC News - World https://ift.tt/2rJCDCx
https://ift.tt/eA8V8J
from BBC News - World https://ift.tt/2rJCDCx
https://ift.tt/eA8V8J