Maya Ellison
Plastic pollution is a pressing environmental issue, with plastic waste accumulating in natural and built environments, including oceans and land. Plastic production has surged from 1.5 million tons in the 1950s to an estimated 448 million tons by 2015, and it is expected to double by 2050. This rapid increase in plastic production has overwhelmed the world's ability to manage and dispose of plastic waste properly. Plastic pollution on land occurs through open dumping, landfills, and incineration, leading to the proliferation of dumpsites and the release of toxic substances into the soil and water. Microplastics, resulting from the breakdown of larger plastic waste, have been found in soil, water, and even the air, with potential negative impacts on soil organisms, plants, and microorganisms. The presence of microplastics in the environment also raises concerns about their potential harm to human health.
| Characteristics | Values |
|---|---|
| Plastic pollution on land | Plastic waste that is not recycled, incinerated, or kept in sealed landfills becomes an environmental pollutant |
| Plastic waste in landfills | Plastic waste in landfills can take up to 1,000 years to degrade, leaching potentially toxic substances into the soil and water |
| Microplastics in soil | Microplastics can enter the soil by settling on the surface and making their way into subsoils, affecting plants, animals, and microorganisms in the soil, which can in turn affect soil fertility |
| Microplastics in the water supply | Microplastics have been found in municipal drinking water systems and have been detected in humans |
| Impact on wildlife | Plastic pollution can cause entanglement, ingestion, and starvation in animals, with nearly 2,100 species, including endangered ones, known to be affected |
| Global plastic production | Global plastic production has surged from 1.5 million tons in the 1950s to 335 million tons in 2016, and is expected to double by 2050 |
| Mismanaged plastic waste | Around one-fifth of plastics are mismanaged, with higher rates in low-to-middle-income countries due to poorer waste management infrastructure |
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What You'll Learn
Plastic waste in landfills
Plastic pollution is one of the most pressing environmental issues, with production expected to double by 2050. The plastic that is discarded every day mostly ends up in landfills, where it may take up to 1,000 years to degrade, leaching potentially toxic substances into the soil and water.
The disposal of plastic waste in landfills has significant environmental and health risks. Plastic waste in landfills can lead to the formation and spread of microplastics, which can be transported by air and leachate into surrounding environments, including waterways. The degradation of plastic waste in landfills can also release harmful volatile organic compounds (VOCs) through oxidative photodegradation, posing risks to both the environment and human health. In addition, the presence of microplastics in the environment can lead to the accumulation of non-biodegradable pollutants, further exacerbating health risks.
Microplastics are plastic particles ranging in size from five millimeters to one nanometer, and they have been found in every ecosystem on the planet, from Mount Everest to the Mariana Trench. They are formed when plastic waste degrades and breaks down into smaller particles. This can happen in landfills, but also in natural environments, where plastic waste can take hundreds or even thousands of years to decompose.
The impact of microplastics in soils, sediments, and freshwater could have long-term negative effects on these ecosystems. Studies have shown that terrestrial microplastic pollution may be four to 23 times higher than marine microplastic pollution. One of the main sources of microplastics is our clothing, with minuscule fibres of acrylic, nylon, spandex, and polyester shed each time we wash our clothes and carried off to wastewater treatment plants or discharged into the open environment.
While microbial degradation presents a promising alternative for managing plastic waste, there is an urgent need for improved waste management practices and policies to mitigate the harmful effects of plastic waste in landfills.
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Microplastics in soil
Plastic pollution is a pressing environmental issue, with production expected to double by 2050. Much of the plastic we discard ends up in landfills, where it can take up to 1,000 years to degrade, leaching toxic substances into the soil and water. These toxins can then seep into groundwater or other water sources, potentially harming the species that drink the water.
Microplastics, plastic particles ranging in size from five millimeters to one nanometer, have been found in every ecosystem on the planet, including our soils. They are present in the soil due to several factors, including the degradation of plastic waste in landfills, the use of synthetic clothing, and the application of sewage sludge as fertilizer.
The impact of microplastics in soil is a growing concern. Research has shown that microplastics can alter the characteristics of soil flora and fauna, affecting their health and soil functions. For example, earthworms make their burrows differently when microplastics are present, which can impact their fitness and the soil condition. Microplastics have also been found to reduce the number of species that live below the surface, such as mites, larvae, and other tiny creatures that maintain the fertility of the land.
Additionally, microplastics can act as a vector for toxic chemicals, transporting them deep into the soil and polluting underground water sources. Studies have also shown that agricultural fertilisers contribute to microplastic concentrations in soils, with concentrations increasing at higher rates when farm manure and inorganic fertilisers are added. The impact of microplastics on land requires further research, but the results to date indicate a long-term negative effect on ecosystems.
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Plastic pollution in wildlife
Plastic pollution is a pressing environmental issue, with plastic waste overwhelming the world's ability to deal with it. Plastic pollution is not limited to oceans and marine environments; it is also found in soils, sediments, freshwater, and the air we breathe.
Plastic waste takes a long time to degrade, with estimates ranging from 100 to 1000 years or more, depending on environmental conditions. During this time, plastic can fragment into smaller pieces, known as microplastics, which have been found in every ecosystem on the planet, from Mount Everest to the Mariana Trench. These microplastics are spread by wind, water, and ocean currents, ending up in even the most remote and uninhabited places.
Microplastics have been detected in drinking water systems, food, and the air, with studies finding over 700,000 microscopic plastic fibres released into the environment during a single cycle of a washing machine. These microplastics have also been found in human organs, with potential negative health consequences.
Wildlife is severely impacted by plastic pollution. Nearly 2100 species, including endangered ones, are affected by plastics. Marine species are particularly vulnerable, with entanglement and ingestion of plastic causing thousands of deaths among seabirds, sea turtles, seals, and other marine mammals each year. Plastic ingestion can block digestive tracts, pierce organs, and cause starvation as animals feel full from ingesting non-nutritious plastic. Research indicates that more than 1500 species in marine and terrestrial environments ingest plastics, with plastic fragments found in over 100 aquatic species, including fish, shrimp, and mussels.
Land-based mammals are also affected, with reported cases of elephants, hyenas, zebras, tigers, camels, and cattle consuming plastic waste, leading to intestinal blockages and internal injuries. Microplastics in soils have been linked to a decline in species that live below the surface, such as mites, larvae, and other tiny creatures, reducing soil fertility and negatively impacting terrestrial ecosystems.
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Plastic's impact on human health
Plastic pollution is a pressing environmental issue, with plastic waste overwhelming the world's ability to deal with it. This waste ends up in landfills, the ocean, and the soil, with plastic able to take up to 1,000 years to degrade. This is particularly true of microplastics, which are plastic particles ranging in size from five millimeters to one nanometer. These microplastics are now found in every corner of the globe, from Mount Everest to the Mariana Trench.
The toxic chemical additives used in plastic production pose a serious threat to human health. People are exposed to these toxins through inhalation, ingestion, and skin contact. The average person may ingest approximately five grams of plastic every week, and microplastics have been found in human blood, livers, kidneys, and placentas. The health effects of this exposure include oxidative stress, DNA damage, organ dysfunction, metabolic disorder, immune response, neurotoxicity, and reproductive and developmental toxicity. Studies have shown that microplastics damage cells in the human body, leading to cancers, lung disease, and birth defects.
The health impacts of plastics are particularly concerning for vulnerable groups, including children, women, workers in the informal waste sector, and marginalized communities. Children and infants in the womb are especially vulnerable to the effects of hazardous chemicals, with exposure to plastics increasing the risks of birth complications, impaired lung growth, and childhood cancer.
The production, use, and disposal of plastics also contribute to climate change, with the global plastics industry projected to account for 20% of total oil consumption and up to 15% of global carbon emissions by 2050. This, in turn, contributes to the numerous health risks associated with warming temperatures and extreme weather events.
Overall, the impact of plastics on human health is an issue of environmental injustice, as the health effects are disproportionately experienced by certain communities and future generations.
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Mismanaged plastic waste
Plastic pollution is a pressing environmental issue, with production increasing exponentially from 2.3 million tons in 1950 to 448 million tons by 2015, and is expected to double again by 2050. Mismanaged plastic waste (MPW) is a significant contributor to this issue. MPW includes urban litter, inadequately contained waste, and plastic waste that is not properly collected or managed. It is a global concern, with particularly high levels in developing economies in Asia and Africa.
The accumulation of MPW in the environment has far-reaching consequences. Firstly, it affects land by contaminating soil and water sources with toxic substances. Microplastics, which are plastic particles ranging in size from 5mm to 1 nanometer, can be found in soils, sediments, and freshwater ecosystems. These microplastics can have a long-term negative impact on terrestrial ecosystems, with researchers estimating that terrestrial microplastic pollution is four to 23 times higher than marine microplastic pollution.
Secondly, MPW contributes to river and ocean pollution. Plastic waste located near inland waterways or coastal regions can be transported via runoff and wind, ending up in rivers and oceans. This plastic pollution poses a threat to marine life, with over 1,500 species affected by ingesting plastics, entanglement, or suffocation. Microplastics have been detected in more than 100 aquatic species, and there are concerns about their potential impact on human health as they have been found in drinking water systems and the human body.
The impact of MPW is influenced by geographical variations, with population density and GDP playing a role in waste generation. Projections indicate that without intervention, the global MPW load will continue to disproportionately affect Africa and Asia. However, developing economies can mitigate this issue by investing in waste management infrastructures as their GDP grows.
Addressing the issue of MPW requires a combination of preventive and curative strategies. This includes controlled consumer demand, material innovation, and investments in better waste management infrastructures and collection technologies. It is crucial to target priority areas for the implementation of effective mitigation policies to reduce the environmental and health impacts of mismanaged plastic waste.
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Frequently asked questions
Plastic pollution has become ubiquitous in natural and built environments, raising concerns about potential harm to humans and nature. Plastic waste can fragment into smaller pieces of plastic, known as microplastics, which can find their way into soil and water. These microplastics can be ingested by animals and have been found to block digestive tracts or pierce organs, causing death.
Plastic pollution on land comes from the improper disposal of plastic waste, such as dropping it on the ground or throwing it out of a car window. Synthetic plastics are largely non-biodegradable and resistant to natural decay processes, so they persist in the environment for long periods. Another source of plastic pollution is the fibres shed from clothing made of synthetic materials, which are carried off to wastewater treatment plants or discharged into the environment.
To reduce plastic pollution on land, it is essential to improve the management of plastic waste. This includes increasing recycling, incineration, and proper disposal in sealed landfills. Domestic policies and foreign investments in waste management infrastructure, especially in low-to-middle-income countries, can play a crucial role in tackling this issue.
