Sea foam may look sinister but it is mostly harmless and natural
Phenomenon, often seen around Britain’s coast at this time of year, is caused by a combination of algae and weatherAt this time of year a sinister-looking substance can often be sighted around Britain’s coast: a frothy foam piled up along the shoreline or appearing in long ribbons offshore. People sometimes assume this foam is the result of pollution or sewage dumping. In fact it is a common natur...