Plastic has emerged as one of the most pressing environmental issues confronting us today. Every year, India generates approximately 3.5 million tonnes of plastic waste. Microplastics are small plastic particles in the environment that are generally smaller than 1 mm to 1 micrometre in size. Microplastics can be created by fragmenting large amounts of plastic waste. Recently, microplastic was discovered in the ice of the Arctic region, demonstrating that it can reach any part of the world and pose numerous hazards. In this article, we will discuss Impact of Microparticles - Plastic Pollution which will be helpful for UPSC exam preparation.

What are Microparticles?

• Microparticles are particles that range in size from 0.1 to 100 m.
• Microparticles are commercially available in a wide range of materials, including ceramics, glass, polymers, and metals.
• Microplastics are tiny plastic particles that are produced as a result of commercial product development as well as the breakdown of larger plastics.
• Microplastics, as a pollutant, can be hazardous to both human and animal health.
• Microplastics can be found in a variety of places, including larger plastic debris that degrades into smaller fragments.
• Furthermore, microbeads, a type of microplastic, are extremely small pieces of manufactured polyethylene plastic that are used as exfoliants in health and beauty products such as cleansers and toothpastes.
• These microscopic particles easily pass through water filtration systems and end up in the ocean and the Great Lakes, posing a risk to aquatic life.
• Microplastics are classified into two types: primary and secondary.
• Microfibers shed from clothing and other textiles, such as fishing nets, are examples of primary microplastics.
• Secondary microplastics are particles that form when larger plastic items, such as water bottles, degrade. This breakdown is caused by exposure to environmental factors, specifically sunlight and ocean waves.

Sample of Water with Microplastics

Impact of Microparticles

• Challenges to Antarctic krill and other zooplankton with plastic beads about 20 microns in size have shown that these microparticulates are readily ingested by these organisms.
• They appear to ingest particles in an unselective manner, with ingestion rates dependent on particle concentration in the environment.
• Plastics are bio-inert and are not expected to be toxic to animals in the traditional sense. While physical obstruction or indirect interference with physiology is always possible (as with sea birds showing satiation after ingesting plastics), the material will pass through the animal virtually unchanged.
• The concern is that plastics exposed to sea water tend to concentrate toxic and non-toxic organic compounds present in sea water at low concentrations.
• Those, which include PCBs, DDT, and nonylphenols, have very high partition coefficients and are efficiently concentrated in the plastic material.
• Plastic-related stress has been documented in over 250 species around the world. Despite the fact that 99 percent of marine species live in the benthos, the focus has largely been on larger species in surface waters or on beaches.
• The impact of negatively buoyant plastic waste (such as nylon net fragments) on benthic species has largely gone unnoticed.
• Despite years of interest in the subject, little research has been conducted by government agencies or the plastics industry to address the key issues concerning plastics in the marine environment.
• The issue with microplastics is that, like all plastics, they do not easily degrade into harmless molecules. Plastics can take hundreds or thousands of years to decompose, wreaking havoc on the environment in the meantime.
• Microplastics are visible on beaches as tiny multicoloured plastic bits in the sand.
• Microplastic pollution is frequently consumed by marine animals in the oceans.
• Microplastics have been found in marine organisms ranging from plankton to whales, as well as commercial seafood and even drinking water.
• To make matters even more complicated, microplastics in the ocean can bind with other harmful chemicals before being consumed by marine organisms.

Plastics as a Waste Material in Land Environment

• Plastic carry bags can clog drains, resulting in an unsanitary environment and water-borne diseases.
• Animals may become ill or die as a result of eating plastics from garbage cans.
• Plastics disposed of on soil are non-biodegradable and impervious, which may halt recharge of ground water aquifers.
• The presence of additives and plasticizers, fillers, flame retardants, and pigments used in plastic products, have the potential to harm human health and pollute ground water.

Plastics as a Waste Material in Marine Environment

• The amount of plastic waste estimated to be introduced into the marine environment each year is not available. However, it is well known that plastic waste is primarily the result of fishing-related activities and non-point source influx from beaches.
• There are two distinct differences between the fate of plastic debris in the ocean and on land.
• The rate of UV-induced photo-oxidative degradation of plastics floating or submerged at sea is much slower than that of plastics exposed to the same solar radiation on land.
  • Unlike on land, there is no easy way to retrieve, sort, and recycle plastic waste that enters the ocean environment.
  • These two factors generally result in longer lifetimes for plastics at sea.
• Plastic waste that has been introduced into the world's oceans must accumulate mostly intact and unmineralized in the marine environment.
• While the fate of such plastics is unknown, it is reasonable to expect at least some of it to continue disintegrating into microparticulate debris.

Microplastics in Antarctica Snow

• For the first time, scientists discovered Microplastics — plastic pieces smaller than a grain of rice — in freshly fallen Antarctic snow, which can influence climate by hastening ice melting.
• Researchers collected snow samples from 19 different locations on Antarctica's Ross Ice Shelf and found plastic particles in all of them.
• There were 13 different types of plastic discovered, with PET (Polyethylene Terephthalate) being the most common. PET is commonly used to make soft drink bottles and clothing.
• An average of 29 microplastic particles per litre of melted snow, which is higher than previously reported marine concentrations from the surrounding Ross Sea and Antarctic sea ice.
• Microplastics may have travelled thousands of kilometres through the air, but the presence of humans in Antarctica is likely to have left a microplastic "footprint."

Measures to Combat the Microplastic Threat

• Local action is required to combat plastic pollution.
• A ban on microplastics in cosmetics, as well as financial incentives to avoid using plastics, are required.
• Countries should work together to set measurable plastic waste reduction targets.
• The media should play an effective role in mobilising the general public against the use of microplastics.
• The role of civil society is critical in preventing the use of microplastics in industry.
• Effective policies must prioritise punitive measures against violators, such as heavy fines and prison terms.
• Public awareness is required to reflect the dangers of microplastics.
• The most effective way to combat pollution is to prohibit the production and distribution of plastics.
• Enforcing waste segregation will help to recover materials and reduce the environmental burden.
• Eco-friendly alternatives such as cloth, paper, and jute bags should be encouraged and adopted.

Global Initiatives to Combat Plastic Waste

• Resolution: In 2022, 124 countries, including India, signed a resolution to draft an agreement that will make it legally binding for the signatories to address the entire life cycle of plastics, from production to disposal, in order to end plastic pollution.
  • As of July 2019, 68 countries had plastic bag bans in place, with varying degrees of enforcement.
• European Union: The Single-Use Plastics Directive entered into force in the European Union in July 2021.
• Closing the loop: It is a project of the United Nations Economic and Social Commission for Asia and the Pacific that assists cities in developing more creative policy solutions to the problem.
• Global Tourism Plastics Initiative: It aims to reduce plastic pollution in the tourism sector by 2025 through a set of actionable commitments.
  • The Initiative will also engage the value chain to promote 100% reusable, recyclable, or compostable plastic packaging, and will commit to collaborate and invest in increasing the recycling and composting rate for plastics.

Conclusion

Scientists are unsure whether consumed microplastics are harmful to human or animal health, and if so, what specific risks they may pose. Nonetheless, many countries are taking steps to reduce the amount of microplastics in the environment. A United Nations resolution from 2017 addressed microplastics and the need for regulations to reduce the risk to our oceans, wildlife, and human health.

FAQs

MCQs

1. What is the primary environmental threat posed by plastic microparticles?

A) They contribute to climate change.
B) They can degrade into toxic chemicals.
C) They cause deforestation.
D) They are absorbed by plants and animals.

2. Which of the following is a primary source of plastic microparticles?

A) Agricultural runoff
B) Plastic waste degradation
C) Forest fires
D) Heavy industrial pollution

3. How do plastic microparticles affect marine animals?

A) They help marine animals grow.
B) They provide a food source.
C) They can be ingested, causing harm.
D) They improve marine biodiversity.

4. What is the size of microparticles that contribute to plastic pollution?

A) Less than 10mm
B) Less than 5mm
C) Less than 1mm
D) Less than 100mm

5. What is the primary solution to mitigating plastic pollution?

A) Banning all plastic products
B) Reducing plastic production and improving recycling
C) Increasing plastic usage for packaging
D) Planting more trees

GS Mains Questions and Model Answers

Q1: Discuss the impact of plastic microparticles on global environmental health.

Answer: Plastic microparticles pose significant threats to global environmental health, primarily through their persistence in ecosystems. These particles accumulate in oceans, soil, and air, where they disrupt food chains by being ingested by marine and terrestrial organisms. Microparticles are chemically toxic and can accumulate in living organisms, leading to bioaccumulation of harmful substances. Additionally, the ingestion of microplastics can impair reproductive health, cause malnutrition, and lead to premature death in marine life. Human exposure to these particles, especially through seafood, poses potential health risks, including inflammation and increased risk of cancer. The presence of plastic microparticles in the environment is a direct result of unsustainable plastic consumption and waste management practices. Solving this issue requires international cooperation, reduction in plastic usage, better waste management, and development of biodegradable alternatives.

Q2: Evaluate the role of public policy in addressing the growing problem of plastic pollution.

Answer: Public policy plays a crucial role in addressing plastic pollution, which has become a global crisis. Governments must implement stricter regulations on plastic production, usage, and disposal. Bans on single-use plastics, incentivizing the recycling industry, and encouraging the development of alternative materials are key to mitigating plastic waste. Policies such as extended producer responsibility (EPR) can hold manufacturers accountable for their products' lifecycle, pushing them to adopt sustainable practices. Additionally, public education campaigns can raise awareness about plastic’s environmental impact and promote behavioral change. International cooperation is vital, as plastic pollution is a transboundary issue, with plastics easily transported across borders through marine and atmospheric systems. Public policy must evolve to ensure that future generations inherit a cleaner, healthier environment.

Q3: How can technological innovations contribute to mitigating the effects of plastic microparticles?

Answer: Technological innovations offer several promising solutions to mitigate the effects of plastic microparticles. Advanced filtration technologies, such as those being developed to capture microplastics from wastewater and stormwater systems, can prevent these particles from entering rivers and oceans. In addition, new biodegradable materials that mimic plastic’s functionality without its environmental persistence are being explored as alternatives. Furthermore, innovations in waste management, such as automated sorting and efficient recycling processes, can reduce the overall volume of plastic waste. On the research front, scientists are working on methods to break down plastics more efficiently, potentially reducing their longevity in ecosystems. Educating and empowering consumers through technologies like apps to track plastic use can also play a significant role in reducing overall plastic consumption. These innovations must be scaled up and implemented globally to address the growing problem of plastic micropollution.

Previous Year Questions on Plastic Pollution

1. UPSC CSE 2022

Question: What are the environmental and health impacts of plastic pollution, and what measures should be taken to address this growing problem?

Answer: Plastic pollution is a major environmental threat, as plastic waste takes hundreds of years to decompose and accumulates in oceans, rivers, and terrestrial ecosystems. The environmental impacts include threats to wildlife, as many marine animals ingest plastic debris, leading to death or long-term health issues. The human health impact comes from the ingestion of microplastics through seafood, which may lead to cancer, hormonal imbalances, and reproductive problems. Measures to address plastic pollution include implementing stricter regulations on plastic production and use, promoting biodegradable alternatives, improving recycling practices, and reducing single-use plastic consumption. Public awareness campaigns and global cooperation are also essential in the fight against plastic pollution.

2. UPSC CSE 2021

Question: Discuss the role of international collaboration in combating plastic pollution in marine ecosystems.

Answer: International collaboration is crucial in combating plastic pollution in marine ecosystems, as this issue transcends national borders. Marine plastic pollution is a global problem, with plastic debris traveling across oceans and affecting wildlife in distant regions. Key international initiatives, such as the United Nations’ Clean Seas Campaign and the Global Partnership on Marine Litter, aim to promote global awareness, share best practices, and develop coordinated policies. The Basel Convention has also included plastic waste in its mandate, providing a framework for managing plastic exports and ensuring proper waste treatment. Collaborative research, technology sharing, and the adoption of sustainable production practices are essential for reducing the flow of plastics into marine ecosystems. By working together, nations can create a global solution to this growing environmental crisis.