Over 80% of marine pollution comes from land-based activities. From plastic bags to pesticides – most of the waste we produce on land eventually reaches the oceans, either through deliberate dumping or from run-off through drains and rivers. This includes: OilOil spills cause huge damage to the marine environment – but in fact are responsible for only around 12% of the oil entering the seas each year. According to a study by the US National Research Council, 36% comes down drains and rivers as waste and runoff from cities and industry. FertilizersFertilizer runoff from farms and lawns is a huge problem for coastal areas. The extra nutrients cause eutrophication – flourishing of algal blooms…