an-made contamination is one of the most serious threats to our oceans. Discarded plastics and other household waste, as well as pesticide and synthetic chemical runoff, inevitably make their way into the sea, wreaking havoc on aquatic life and the ecosystems that they depend on. Oil leaks, plastic, agricultural waste, and chemical waste all contribute to marine pollution, also known as ocean pollution. Both of these factors, when applied, add to the pollution of our waters, and hence fall into the category of aquatic pollution. According to estimates, 80 percent of aquatic waste originates on shore. Land-based toxins, such as farm run-off and nutrients from sewage outflows, contribute to underwater 'death zones,' which are habitats that can no longer support life.