There are many causes for water pollution. The main one is plastic. The reason is that plastic takes four hundred and fifty years to decompose in water. Furthermore, many companies use plastic and people throw it into waterways. Because water can float and be carried by wind, it can cause harm to unsuspecting creatures hundreds of feet from where it was originally discharged. Such waste includes bags, bottles, cups, straws, cup lids, utensils, carriers, cling film, fishing line items, bait bags and floats. The second most important cause of water pollution is waste from ships. The ships brought a lot of garbage with them and dumped it. This was very common until the government intervened. They were fining sailors up to a million dollars for disposing of waste. For this reason, ships now carry less waste. Animals aren't the only thing harmed by wasting water. Fishing lines, ropes and plastic nets get caught in the canal and the engine, but the ships aren't exactly perfect. The other main cause of water pollution...