Maya Ellison
Plastic is a major contributor to climate change, threatening the global community's ability to keep temperature rise below 1.5°C. As 99% of plastics are derived from fossil fuels, plastic production, use, and disposal are all linked with greenhouse gas emissions. Greenhouse gases are emitted at every stage of plastic's life cycle, from the extraction and transport of fossil fuels, to plastic refining and manufacture, to the management of plastic waste. Incineration of plastic waste releases significant greenhouse gases, but other disposal methods such as recycling also contribute to emissions. Plastic pollution in the oceans may interfere with the ocean's capacity to absorb and sequester carbon dioxide, further accelerating climate change. The impact of plastic on climate change is a pressing issue that requires urgent attention and action.
| Characteristics | Values |
|---|---|
| Plastic production | 460 million metric tons in 2019 |
| % of global oil consumption associated with plastic | 4-8% |
| % of oil consumption by plastic by 2050 | 20% |
| Plastic's contribution to global carbon emission budget by 2050 | 21% to 31% |
| Plastic's contribution to global carbon emission budget currently | 4 times more than the airline industry |
| Fossil fuels used for plastic production | Natural gas, crude oil |
| Global plastic production | 300 million tons/year |
| Plastic decomposition time | 1000 years |
| Plastic waste management | Landfilling, recycling, incineration |
| Greenhouse gas emissions from incineration in 2015 | 5.9 million metric tons of CO2e |
| Greenhouse gas emissions from plastic production in 2015 | 1.96 Gt of CO2e |
| % of methane emissions from landfills | >15% |
| Plastic in oceans | Twice the size of Texas |
| Plastic's impact on climate change | Heat-trapping gases emitted at every stage of the plastic lifecycle |
| Plastic's contribution to climate change | 3.3% of global emissions |
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What You'll Learn
Plastic is derived from fossil fuels
Crude oil and natural gas accumulate in reservoirs at the bottom of oceans and beneath the Earth's surface. Coal, on the other hand, primarily originates from dead plants. To extract these fossil fuels, various methods such as drilling and mining are employed. The specific processes depend on the type of fuel and the geographical location of the reserves.
In the context of plastic production, fossil fuels serve as feedstock for petrochemical crackers. These crackers break down the complex hydrocarbons into smaller molecules through processes like distillation and cracking. For example, naphtha, a mixture of hydrocarbons obtained from crude oil distillation, can be further processed to produce propylene, a monomer used in polymerization reactions to create plastics.
The refinement of crude oil and natural gas into plastics involves multiple steps, including distillation, cracking, and polymerization. Polymerization, in particular, is a critical process where hydrocarbon monomers are linked together through chemical reactions to form long polymer chains. These polymers are the building blocks of plastics, giving them their unique properties such as durability and flexibility.
The deep connection between the fossil fuel and plastic industries is undeniable. With over 99% of plastic derived from fossil fuels, the continued expansion of plastic production threatens to lock the global economy into a reliance on these non-renewable resources. As a result, efforts to mitigate climate change by reducing carbon pollution are undermined, highlighting the urgent need for sustainable alternatives and responsible consumption.
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Greenhouse gases are emitted during plastic refining and manufacturing
Greenhouse gas emissions are associated with everything from fossil fuel extraction to plastic manufacturing and the disposal of plastic waste. As 99% of plastics are made from fossil fuels, plastic pollution is linked to climate change. The production and incineration of plastic add greenhouse gases to the atmosphere, and the extraction and transport of fossil fuels to create plastic also produce significant greenhouse gases.
The refinement of plastics emits an additional 184 to 213 million metric tons of greenhouse gases each year. In 2015, CO2 and other GHG emissions from plastic production reached 1.96 Gt of CO2e, at a cost of $341 billion annually. The production stage, which involves converting fossil fuels into plastics, accounts for most of these emissions, primarily in the form of carbon dioxide.
The “Hidden Costs" report by the Center for International Environmental Law suggests that a transition toward "zero waste" is the best path to reduce emissions. This involves responsible production, consumption, reuse, and recovery of materials without incineration or landfilling. However, the disposal of plastics through incineration, landfill, or recycling also contributes to GHG emissions.
The impact of plastic on climate change is not limited to direct emissions. Plastic pollution affects vulnerable ecosystems such as the ocean and mountain areas, creating a significant stress factor on biodiversity. Plastic in the oceans may interfere with their capacity to absorb and sequester carbon dioxide, accelerating climate change. Microplastics ingested by plankton and the accumulation of plastic in vulnerable communities contribute to the climate crisis.
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Plastic waste management produces greenhouse gases
The extraction, refining, and manufacture of plastics are all carbon-intensive activities. The extraction and transport of fossil fuels for plastic creation produce greenhouse gases, including methane leakage, emissions from fuel combustion, and energy consumption in the drilling process. The refinement of plastics emits an additional 184 to 213 million metric tons of greenhouse gases annually.
The disposal of plastics in landfills, which account for the majority of plastic waste management, leads to increased landfill size and methane emissions. Landfills contribute to more than 15% of methane emissions, and the expansion of landfills exacerbates these emissions. Incineration of plastic waste, while less common, results in extremely high emissions and is a significant driver of emissions from plastic waste management.
The impact of plastic waste on the environment, particularly oceans, further contributes to greenhouse gas emissions. Plastic on the ocean's surface releases methane and other greenhouse gases as it degrades, and these emissions increase as plastic breaks down. This process may also interfere with the ocean's capacity to absorb and sequester carbon dioxide, potentially accelerating climate change.
The global production and use of plastic are closely tied to the fossil fuel industry, and the reliance on plastics is expected to increase the sector's fossil fuel consumption. As a result, plastic waste management is intrinsically linked to greenhouse gas emissions, and efforts to reduce plastic waste and transition towards more sustainable practices are crucial to mitigating climate change.
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Plastic in oceans interferes with carbon absorption
Plastic in the oceans may interfere with the ocean's ability to absorb and sequester carbon dioxide, accelerating climate change. Oceans absorb 30-50% of carbon dioxide emissions from human-related activities. However, plastic pollution in oceans negatively impacts their role as natural carbon sinks.
Plankton and phytoplankton ingest microplastics, which make their excretion more buoyant, causing it to float more and sink slower. This gives carbon more time to escape back into the atmosphere, disrupting the carbon capture cycle. Additionally, plastic debris exposed to sunlight releases carbon, further contributing to carbon emissions.
The presence of plastic in the oceans also poses a threat to marine life, including whales, which play a crucial role in carbon capture. Whales store a significant amount of CO2 during their lifespan, trapping it for hundreds of years when they sink to the ocean floor after death. However, plastic ingestion, entanglement, and pollutant buildup contribute to premature whale deaths, reducing their carbon capture capacity.
Furthermore, bottom-trawling, a fishing technique that uses large nets to sweep the ocean floor, disturbs sediment and releases stored carbon. It also destroys algae, a vital component in capturing carbon. The combination of plastic pollution and climate change has a significant impact on biodiversity, affecting various ecosystems such as oceans and mountain areas.
The plastic problem is not limited to the oceans; it permeates every part of the planet, from Mount Everest to the Mariana Trench. Plastic pollution in landfills contributes to methane emissions, and the production, use, and disposal of plastic generate significant greenhouse gas emissions. As plastic originates from fossil fuels, continued reliance on plastic will increase fossil fuel consumption, exacerbating the climate crisis.
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Plastic packaging and single-use plastics contribute to emissions
The refinement of plastics emits an additional 184 to 213 million metric tons of greenhouse gases annually. Moreover, the global plastic industry's rapid growth, largely fuelled by natural gas, undermines efforts to reduce carbon pollution. It is estimated that by 2050, greenhouse gas emissions from plastics could reach about 13% of the entire remaining carbon budget.
Single-use plastics, designed for convenience and one-time use, are a prime culprit in the throw-away culture. They comprise half of the over 300 million tons of plastic produced annually worldwide. Single-use plastic waste often ends up in landfills, contributing to the increasing landfill size and methane emissions. Landfills account for more than 15% of methane emissions, and the disposal of more plastics in landfills exacerbates these emissions.
Incineration of plastic waste, including plastic packaging, is another significant contributor to greenhouse gas emissions. Incineration releases toxic pollutants and high levels of greenhouse gases into the atmosphere. Recycling, while reducing virgin plastic use, also has emissions associated with it.
The impact of plastic packaging and single-use plastics on emissions extends beyond their disposal. Plastic pollution in oceans and other ecosystems can interfere with their capacity to absorb and sequester carbon dioxide. Additionally, microplastics in the oceans are ingested by plankton, potentially affecting the ocean's ability to mitigate carbon dioxide emissions.
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Frequently asked questions
Plastic affects greenhouse gases at every stage of its life cycle, from production to disposal. The production of plastic involves the extraction and transport of fossil fuels, which produces significant greenhouse gas emissions. Plastic refining and manufacture are also carbon-intensive activities, and the incineration of plastic waste releases additional greenhouse gases into the atmosphere.
The specific greenhouse gases emitted by plastics include carbon dioxide, methane, and other heat-trapping gases. Plastic waste in landfills accounts for more than 15% of methane emissions, and the incineration of plastic releases significant amounts of carbon dioxide.
Plastic pollution is widespread, affecting ecosystems from the ocean to Mount Everest. It takes more than 1,000 years for plastic to decompose, and the global annual production of plastic has increased exponentially over the past decades. The rapid growth of the plastic industry, fueled by natural gas, undermines efforts to reduce carbon pollution and contributes to climate change.
