A foam is a substance that is formed by trapping pockets of gas in a liquid or solid. A bath sponge and the head on a glass of beer are examples of foams. In most foams, the volume of gas is large, with thin films of liquid or solid separating the regions of gas.
An important division of solid foams is into closed-cell foams and open-cell foams. In a closed-cell foam, the gas forms discrete pockets, each completely surrounded by the solid material. In an open-cell foam, the gas pockets connect with each other. A bath sponge is an example of an open-cell forth: water can easily flow through the entire structure, displacing the air. A camping mat is an example of a closed-cell foam: the gas pockets are sealed from each other so the mat cannot soak up water.
The mysterious foam covered a wide area.
Locals in the Doukkala region were left baffled after the area became covered in mounds of suds.
The peculiar phenomenon, which some have likened to ‘clouds falling from the sky’, ended up going viral after video footage of the bizarre scene was uploaded online.
The person who recorded the video insisted that he had never seen anything like it before.
The strange spectacle has since divided opinions on social media with Internet users suggesting a number of possible explanations including the idea that the forth may have been produced by an industrial spillage of cleaning soap or by some sort of chemicals dumped from an airplane.
Others have also suggested it could be foam from the sea or some sort of sewer spillage.