Sea pollutionPPT
IntroductionSea pollution refers to the discharge of harmful substances into ...
IntroductionSea pollution refers to the discharge of harmful substances into the sea, resulting in a change in the physical, chemical, and biological characteristics of the sea, causing harm to the marine environment and human health. This pollution can be caused by both natural and human factors. Natural factors include rivers bringing in pollutants, winds carrying dust and smoke into the sea, and oil spills from natural seepage. Human factors include the discharge of industrial wastewater, the dumping of domestic waste, the use of sea water as a heat exchange medium, and the use of sea water for cooling.CausesIndustrial wastewaterIndustrial wastewater is one of the main causes of sea pollution. Chemical factories, oil refineries, paper mills, and other factories discharge a large amount of wastewater into the sea, containing a variety of pollutants, including organic matter, nitrogen, phosphorus, heavy metals, and other pollutants. These pollutants can cause serious damage to marine life and human health.Domestic wasteDomestic waste is another major source of sea pollution. Every day, people generate a large amount of garbage, including plastic bags, food packaging, and other non-biodegradable garbage. When these garbage are not properly handled and enter the sea, they will cause serious damage to marine life and the marine environment.Oil spillsOil spills are also a serious threat to the marine environment. Accidental leaks from ships and oil tankers, as well as oil dumping by individuals or organizations, can cause oil slicks on the surface of the sea. These oil slicks can cover a large area and cause serious damage to marine life and the marine environment.EffectsSea pollution can cause serious damage to the marine environment and human health. It can damage marine life such as fish and coral reefs, and also affect human fisheries and tourism industries. In addition, sea pollution can also cause diseases in humans, such as gastrointestinal diseases and skin diseases. Long-term sea pollution may also lead to climate changes. Therefore, we need to pay attention to protect our sea environment and take action to prevent sea pollution.
