
The ocean is a vital resource for the planet, providing climate regulation, food, jobs, and economic growth. Covering over 70% of the Earth, oceans are home to most of the life on the planet, from algae to blue whales. However, human activity is causing significant harm to this precious ecosystem through pollution, including plastic waste, oil spills, carbon emissions, and noise pollution. The majority of the garbage entering the ocean is plastic, which does not biodegrade and persists for centuries, harming marine life and entering the human food chain. Oil from boats, planes, and vehicles also contributes to water pollution, along with chemical discharges and agricultural runoff. With trillions of pieces of plastic polluting the oceans, it is a global crisis requiring urgent action. Organisations like The Ocean Cleanup are working to address this issue, aiming to remove 90% of floating ocean plastic by 2040. It is crucial that we all do our part to protect the ocean, for the sake of our future survival and the well-being of all marine life.
What You'll Learn
The economic impact of ocean pollution
Oceans are among the earth's most valuable natural resources, governing the weather, cleaning the air, helping feed the world, and providing a living for millions. However, human activities have led to oceans being bombarded with pollution, including plastic, oil, carbon emissions, and noise. This pollution has significant economic impacts, particularly on industries such as tourism and fishing, which rely on marine environments for their livelihoods.
One of the primary sources of ocean pollution is plastic. Trillions of pieces of plastic pollute the oceans, and this plastic can persist for many decades, degrading into microplastics that are ingested by wildlife and can later enter the human food chain. The majority of the plastic that enters the ocean comes from land-based sources, including single-use plastic bags, water bottles, drinking straws, and yogurt containers, which are dumped directly into the sea or make their way into the ocean via storm drains, sewers, and other routes. Marine plastic pollution has far-reaching economic repercussions, impacting fisheries and tourism.
Fisheries are affected by plastic pollution through dumped catch, fouling incidents, net repairs, and time lost cleaning nets. Additionally, "ghost fishing", where lost or derelict fishing gear continues to catch species, results in lost catch opportunities and financial losses for fishers. Plastic pollution also poses a threat to the health of marine life, with fish ingesting plastic, which could potentially harm fisheries if the perceived threat of plastic-infested seafood deters consumers.
Tourism is another industry that is significantly impacted by ocean pollution. Marine debris on beaches can degrade the aesthetic appeal of the environment, deterring tourists from visiting and spending money in coastal communities that rely on tourism. A NOAA-funded study found that doubling the amount of marine debris on beaches in coastal Alabama resulted in an estimated decrease of 1 million visitor days, leading to a loss of tourism revenue and a decrease in local jobs.
In addition to plastic pollution, other forms of ocean pollution, such as oil spills, chemical discharges from factories, and agricultural runoff, contribute to algal blooms and aquatic dead zones. These pollutants can also have economic impacts, particularly on industries that rely on marine ecosystems, such as tourism and fishing.
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The Great Pacific Garbage Patch
The impact of the Great Pacific Garbage Patch is devastating for marine wildlife and ecosystems. Plastics can persist in the ocean for decades, continuously degrading into microplastics that can be ingested by wildlife and enter the human food chain. The patch also contributes to the constant noise pollution that is harming and killing marine species worldwide.
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Point source pollution
The UK is taking steps to tackle ocean pollution, with organisations like The Ocean Cleanup deploying technologies to rid the oceans of plastic. The Ocean Cleanup has removed tens of millions of kilograms of plastic from oceans and rivers globally.
Factories, including oil refineries, chemical plants, and automobile manufacturers, often discharge pollutants into bodies of water. This can include oil, chemicals, and other toxins. When factories mix their waste with urban runoff in combined sewer systems, it can result in combined sewer overflow (CSO), which is considered point source pollution. CSO can cause severe damage to human health and the environment.
Sewage treatment plants are another major source of point source pollution. When these facilities are faulty or overwhelmed by excessive rain, raw sewage can overflow directly into nearby water bodies without proper treatment. This untreated sewage contains harmful chemicals and pollutants that can contaminate rivers and oceans, impacting aquatic life and rendering water unsafe for human use.
Large farms that raise livestock, known as concentrated animal feeding operations (CAFOs) or concentrated feeding operations (CFOs), are also sources of point source pollution. If these farms do not properly treat their animals' waste, the untreated sewage can enter nearby water bodies, contributing to high levels of pollution. To control point source discharges, the Clean Water Act established the National Pollutant Discharge Elimination System (NPDES), requiring factories, sewage treatment plants, and other point sources to obtain permits and use the latest technologies to treat their effluents before discharge.
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Nonpoint source pollution
NPS pollution is difficult to control because it comes from multiple locations. Unlike pollution from a single source, such as an oil or chemical spill, NPS pollution comes from many diffuse sources. While the concentration of pollutants from NPS pollution may be lower than that of point source pollution, the total amount of pollutants delivered from nonpoint sources may be higher due to the numerous sources.
The effects of NPS pollution on specific waters may vary and may not always be fully assessed. However, it is known to have harmful effects on drinking water supplies, recreation, fisheries, and wildlife. NPS pollution can make water unsafe for humans and wildlife, leading to beach closures after rainstorms. It can also impact the commercial fishing industry and drive down property values in coastal communities.
In Britain, efforts are being made to address NPS pollution. The National Oceanic and Atmospheric Administration 's (NOAA) Coastal Zone Management Program is creating special nonpoint source pollution control plans for each coastal state participating in the program. When NPS pollution causes problems, NOAA scientists help track down the exact causes and find solutions. Additionally, organizations such as The Ocean Cleanup are developing and scaling technologies to rid the oceans of plastic pollution, including intercepting plastic in rivers and cleaning up accumulated ocean plastic.
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The UK's role in reducing ocean pollution
The UK has a crucial role to play in reducing ocean pollution, which is a global crisis requiring urgent collective action. With oceans covering over 70% of the Earth's surface and regulating our climate, the health of this vast resource is of utmost importance. The UK's efforts to combat ocean pollution can be seen through various initiatives and contributions.
One of the significant ways the UK is tackling ocean pollution is by addressing plastic waste. Plastic pollution is a pressing issue, with an estimated 11 million tons of plastic entering the ocean annually, causing severe environmental and economic impacts. The UK has implemented measures to reduce single-use plastics, such as plastic bags, water bottles, and straws, which contribute significantly to marine debris. The country has also supported organisations like The Ocean Cleanup, which aims to remove 90% of floating ocean plastic by 2040 through innovative technologies and river interception methods.
In addition to plastic pollution, the UK is taking steps to mitigate other forms of ocean pollution. This includes reducing carbon emissions, as oceans absorb a significant portion of man-made carbon dioxide, leading to acidification and altered pH levels. By transitioning to cleaner energy sources and promoting sustainable practices, the UK contributes to global efforts to reduce greenhouse gas emissions and combat climate change.
Noise pollution is another area of concern for the UK. Human-generated underwater noise pollution from boats, airplanes, and industrial activities can have detrimental effects on marine life, particularly for species that rely on sound for communication and navigation. The UK has recognised the importance of minimising noise pollution and is working towards implementing measures to reduce its impact on marine ecosystems.
The UK also plays a role in international cooperation and awareness regarding ocean pollution. By participating in global conferences, such as the United Nations Ocean Conference, the UK joins other nations in discussing and addressing ocean health and sustainability. Additionally, the UK supports educational initiatives and research projects aimed at understanding and mitigating the impacts of pollution on marine ecosystems.
While the UK has taken important steps towards reducing ocean pollution, continued efforts and collaboration are necessary to address this global challenge effectively. Protecting the health of our oceans is crucial for the well-being of marine life, coastal communities, and the planet as a whole. The UK's ongoing commitment to tackling ocean pollution is vital for driving positive change and ensuring a sustainable future for all.
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Frequently asked questions
The majority of the garbage that enters the ocean each year is plastic, with trillions of pieces of plastic currently polluting our oceans. The biggest source of plastic pollution is nonpoint source pollution, which occurs as a result of runoff from septic tanks, vehicles, farms, livestock ranches, and timber harvest areas.
Ocean pollution has a devastating impact on marine wildlife and ecosystems. Plastic waste can entangle marine life and be ingested by wildlife, later entering the human food chain. Marine debris has been found at the bottom of the deepest ocean trench and has even been spotted in Hawaii. Ocean pollution also includes noise pollution, which is harming and killing marine species worldwide.
Oceans absorb as much as 25% of all man-made carbon emissions, which changes the pH of surface waters and leads to acidification. Oceans are now acidifying faster than they have in 300 million years. As oceans absorb carbon emissions, they also take up more than 90% of the excess heat in the climate system, helping to regulate temperatures on land.
Organisations such as The Ocean Cleanup are developing technologies to rid the oceans of plastic, aiming to remove 90% by 2040. To tackle ocean pollution, we can also reduce our plastic consumption, donate to organisations working to clean the oceans, and advocate for climate action to protect the health of our oceans.