Why are east coast beaches dirty and smelly. why are the beaches on the west coast nice and calm on the west coast. why are their beach waters' bright blue and clear?

East Coast beaches may experience pollution and runoff from urban areas, leading to dirtier and smellier conditions due to higher population density and industrial activity. In contrast, West Coast beaches often benefit from more stringent environmental regulations and less urban runoff, contributing to cleaner, clearer waters. Additionally, ocean currents and geography on the West Coast help maintain cooler, clearer water, enhancing the overall beach experience. The Pacific Ocean's natural filtration and nutrient dynamics also contribute to the vibrant blue color of the waters.