Rotating garbage island bigger than many countries is floating in Pacific: This 1.6 million sq km patch contains 1.8 trillion pieces of plastic & is causing serious harm to nature

Imagine an area of ocean stretching across about 1.6 million square kilometres, filled with fishing nets, ropes, buoys, plastic fragments and countless tiny pieces of microplastic.

This is the Great Pacific Garbage Patch, one of the world's most well-known marine pollution hotspots.

Despite its name, however, it is not a solid island of rubbish floating in the Pacific Ocean. According to the National Oceanic and Atmospheric Administration (NOAA), the debris is spread across a huge area of the North Pacific, with concentrations varying from one location to another. Much of the plastic is so small that it cannot be seen easily, meaning a ship can pass through parts of the patch without seeing a sea of rubbish.


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A landmark 2018 study published in Scientific Reports estimated that the Great Pacific Garbage Patch covers around 1.6 million square kilometres and contains approximately 1.8 trillion pieces of plastic, with an estimated mass of about 79,000 tonnes.

Where is the Great Pacific Garbage Patch?

The Great Pacific Garbage Patch lies in the North Pacific Ocean, roughly between Hawaii and California.

It forms within the North Pacific Subtropical Gyre, a vast system of rotating ocean currents. Winds, Earth's rotation and ocean circulation work together to move floating material around the region, causing some debris to become concentrated in areas where currents converge.

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NOAA explains that garbage patches are created by rotating currents known as gyres, which can draw marine debris towards areas of higher concentration.

The patch is not static, either. Winds and currents continually move and redistribute the debris, which means its boundaries and concentration can change over time. NOAA notes that this also makes it difficult to establish one fixed size for the patch.

How much plastic is in the Great Pacific Garbage Patch?

The most widely cited estimate comes from a 2018 study published in Scientific Reports.

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Researchers combined data from vessel-based surface surveys, aerial observations and ocean modelling. Their analysis estimated that the 1.6 million-square-kilometre area contained around 1.8 trillion plastic pieces, with a possible range of 1.1 trillion to 3.6 trillion.

The estimated mass was approximately 79,000 tonnes, although the researchers gave a range of 45,000 to 129,000 tonnes.

The study found that microplastics made up the overwhelming majority of the pieces by number. However, larger objects contributed far more to the total weight.

This creates an important distinction: the Great Pacific Garbage Patch may contain an enormous number of plastic fragments, but it is not necessarily covered by a visible layer of rubbish.

Why is the garbage patch not a floating island?

The phrase “garbage island” can create a misleading picture.

NOAA says garbage patches are not islands that can be walked on or seen as giant continuous masses of rubbish. Instead, marine debris is dispersed across the surface and through parts of the water column.

Some areas contain higher concentrations of plastic, while others may have very little visible debris.

Much of the material consists of microplastics, which are tiny fragments that can be difficult to see with the naked eye. Larger objects, including fishing nets, ropes, crates and buoys, are also found within the region.

What is the Great Pacific Garbage Patch made of?

The debris includes a mixture of plastic items and fishing-related material.

The 2018 Scientific Reports study estimated that fishing nets alone accounted for more than 46% of the plastic mass in the patch. The researchers also identified larger items such as crates, bottles and fishing equipment, alongside smaller fragments, bottle caps and other plastic objects.

A separate 2022 study examined more than 6,000 plastic objects larger than five centimetres. It found that between 75% and 86% of the plastic in that size category could be attributed to abandoned, lost or discarded fishing gear and offshore fishing and aquaculture activities.

This does not mean that all ocean plastic comes from fishing. Plastic also reaches the sea through rivers, coastal activities, poor waste management and other sources.

Why is fishing gear a major problem?

Abandoned and lost fishing equipment can remain in the ocean long after it has been separated from fishing vessels.

Nets, ropes and other gear can continue trapping marine animals without human control, a phenomenon known as ghost fishing.

NOAA says marine debris can entangle animals such as whales, turtles and other wildlife. Derelict fishing gear can continue to capture fish and other animals even after it is no longer under the control of a fisher.

The problem can also continue as larger plastic objects gradually break apart, creating smaller fragments that can remain in the marine environment.

How does plastic affect marine animals?

The Great Pacific Garbage Patch poses risks to marine life through both ingestion and entanglement.

According to NOAA's Marine Debris Program, more than 700 species have been documented consuming plastic. These include seabirds, fish, turtles and marine mammals. Animals may mistake plastic for food or swallow it accidentally while feeding on natural prey.

Marine debris can also become wrapped around animals or interfere with their movement. Nets, ropes and plastic bands can cause injuries, while ingested debris can damage the digestive system or create a false feeling of fullness.

Is the Great Pacific Garbage Patch getting bigger?

The amount and distribution of plastic in the region are difficult to track because the patch constantly shifts.

The 2018 study found evidence that plastic was accumulating rapidly in the area and estimated a substantial concentration of plastic compared with surrounding waters.

More recent modelling has focused not only on how much plastic is already there, but also on what could happen if new plastic continues entering the system.

A Scientific Reports study published in March 2026 modelled future cleanup scenarios using operational data from The Ocean Cleanup. The researchers examined plastic growth rates of 1% and 3% a year for some of the modelled scenarios, alongside different cleanup strategies and system efficiencies.

How much plastic has been removed from the garbage patch?

Cleaning the Great Pacific Garbage Patch is a major engineering challenge because the debris is spread over such a large and constantly moving area.

The 2026 Scientific Reports study analysed data from 72 collection periods carried out between August 2021 and November 2024. Those operations removed a cumulative 372,733kg of plastic, or about 373 tonnes, from the North Pacific Garbage Patch.

The study also noted that, by the end of 2024, The Ocean Cleanup had collected 504,229kg of plastic waste larger than 1.5 centimetres from the region across its different operational phases.

Can the Great Pacific Garbage Patch be completely cleaned?

Scientists say removing existing plastic is only part of the challenge.

The 2026 study modelled a 10-year cleanup operation beginning in 2027 and examined different numbers of cleanup systems, retention efficiencies, steering strategies and rates of plastic accumulation.

Under an optimal scenario, the researchers found that more than 80% of the modelled plastic mass larger than 1.5 centimetres could potentially be removed over a decade. However, the outcome depended heavily on how efficiently cleanup systems were deployed and how accurately they could target areas with higher plastic concentrations.

The researchers also stressed the importance of reducing the amount of new plastic entering the ocean. Cleanup alone cannot address the problem if fresh waste continues to accumulate.

Stopping plastic at the source

The Great Pacific Garbage Patch is ultimately a symptom of a much wider problem: plastic entering the world's oceans.

NOAA says garbage patches are created by the movement and concentration of marine debris, rather than being isolated islands of waste. Preventing plastic from reaching the ocean is therefore crucial alongside efforts to recover existing debris.

The scale of the Great Pacific Garbage Patch is striking, but its most important lesson may be simpler. Plastic that reaches the ocean does not simply disappear. It can travel vast distances, accumulate in ocean currents, break into smaller pieces and threaten marine life.

Cleaning up the waste already floating in the Pacific may help, but reducing the flow of new plastic into the sea remains an essential part of tackling the problem.