Pollution comes from run-off, sewage systems, and garbage. However, this typically all ends up in the ocean after there is rain or floods. Everything that ends up in the water changes the quality and balance of the ocean. Poor coastal water quality has adversely affected fisheries, tourism and mariculture, as well as undermining biological sustainability of the living resources of ocean and coastal habitats. Jamaica imports and exports many goods through their waters. Some of the imports that go into Jamaica include petroleum and petroleum products. Issues include accidents at sea; risk of spills through local and international transport of petroleum and petroleum products. Oil spills can disrupt the marine life with chemicals that are not normally found in the ocean. Other forms of pollution also occur in Jamaica. Solid waste disposal mechanisms in Jamaica are currently inadequate. The solid waste gets into the water through rainfall forces. Solid waste is also harmful to wildlife, particularly birds, fish and turtles that feed at the surface of the water and mistake floating debris for food. For example, plastic can be caught around birds and turtles necks making it difficult to eat and breath as they begin to grow causing the plastic to get tighter around their necks. Pieces of plastic, metal, and glass can be mistaken for the food fish eat. Each Jamaican generates 1 kg (2 lbs) of waste per day; only 70% of this is collected by National Solid Waste Management Authority (NSWMA)—the remaining 30% is either burnt or disposed of in gullies/waterways.