Meghan Hodges
Factories are a major source of pollution, and their emissions contribute significantly to global warming and climate change. The energy industry, including coal-fired power plants, is the most polluting sector, generating billions of tonnes of greenhouse gas emissions annually. Other highly polluting industries include transport, manufacturing, construction, fashion, and food retail. These industries emit carbon dioxide, methane, and other pollutants, leading to air, water, and land degradation. In addition to emissions, factories also produce toxic waste, which can contaminate soil, water sources, and the air, causing serious health issues for nearby communities and beyond. To meet climate goals and reduce pollution, a transition to renewable energy sources and sustainable practices is essential.
| Characteristics | Values |
|---|---|
| Most polluting industries | Fossil fuels, fashion, food retail, energy, transport, construction, agriculture, manufacturing |
| Impact | Climate change, environmental degradation, air, water, and land pollution, health issues |
| Energy sources | Coal, oil, gas, renewable power |
| Carbon dioxide emissions | 40.5 gigatons of CO2 from fossil fuels in 2022 |
| Carbon dioxide impact | Global warming, climate change, health issues |
| Fashion industry impact | Water consumption, plastic waste, toxic dyes, textile waste, carbon emissions |
| Food retail impact | Food waste, plastic waste |
| Construction industry impact | Dust pollution, air quality deterioration |
| Transport industry impact | Emissions from vehicles, deliveries, and supply chains |
| Energy industry impact | Oil spills, ocean pollution, carbon emissions |
| Water pollution signs | Oily residue, foamy or sticky substances, unhealthy plants and animals, liquid waste, chemical containers |
| Health effects of factory pollution | Skin rashes, stomach problems, asthma, cancer |
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What You'll Learn
Fossil fuels
The burning of fossil fuels for electricity, heat, and transportation is the largest source of greenhouse gas emissions from human activities in the United States. Over 94% of the fuel used for transportation is petroleum-based, resulting in direct emissions. The transportation sector is the largest source of direct greenhouse gas emissions and the second-largest source when indirect emissions from electricity end-use are considered. In 2022, 60% of electricity in the US came from burning fossil fuels, mostly coal and natural gas.
Greenhouse gas emissions from industry primarily come from burning fossil fuels for energy, as well as certain chemical reactions necessary to produce goods from raw materials. Industrial emissions are the third-largest source of direct emissions. If indirect emissions from electricity use are allocated to the industrial sector, industrial activities account for a much larger share of US greenhouse gas emissions.
Commercial and residential greenhouse gas emissions come from fossil fuels burned for heat and the use of gases for refrigeration and cooling in buildings. In 2023, half of the world's fossil fuel and cement carbon dioxide emissions came from just 36 entities. If Saudi Aramco were a country, it would be the fourth-largest polluter in the world, after China, the US, and India. Together with ExxonMobil, Chevron, Shell, TotalEnergies, and BP, they accounted for 5% of global carbon dioxide emissions from fossil fuels.
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Fast fashion
The fast-fashion business model relies on the exploitation of natural resources and human labour to deliver garments following the latest trends to consumers at an unprecedented rate. This quick output demands a large volume of raw materials, creating a significant amount of waste, pollution, and degradation to air, water, and wildlife habitats. The proliferation of chemicals and microplastics in waterways has devastating impacts on both terrestrial and aquatic environments.
The human costs of fast fashion are evident in the exploitation of workers in low-income countries where factories are based. Workers, primarily young women, are subjected to hazardous working conditions and earn unliveable wages despite companies making massive profits. The average workday of a garment worker is between 12 and 15 hours, and less than 2% make a living wage. In 2013, the deadliest clothing accident in history occurred when 1,132 workers were killed, and 2,500 injured, in the collapse of the Rana Plaza garment factory in Bangladesh due to structural failure and business owners' neglect.
Some of the biggest fast fashion companies contributing to environmental pollution include Shein, Zara, Mango, and Forever 21. Shein has been criticised for its unsustainable practices, including adding at least 500 products to its website daily and selling more than 36 million pounds of goods globally each year. Despite facing growing backlash, the company has not committed to switching to sustainable fabrics and materials. Forever 21 has also been scrutinised for its labour practices, including underpaying workers and failing to sign the Bangladesh accord, which guarantees garment workers' safety and rights.
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Food retail
Food waste alone accounts for an estimated 8 to 10% of global greenhouse gas emissions, with the UK wasting about 1.9 million tonnes of food annually. This waste is not just leftovers in refrigerators but also includes unsold food from grocery stores, restaurants, and suppliers that ends up in landfills. The use of plastic packaging further exacerbates the problem, as plastic is derived from oil, contributing to emissions and polluting ecosystems when not properly disposed of.
Transporting food to retail outlets also generates emissions, depending on the distance travelled, known as food miles. The expansion of international food supply chains has led to increased fuel consumption in transporting food over longer distances. Additionally, the energy-intensive refrigeration processes in food retail contribute to emissions.
To address these issues, reducing food waste, improving energy efficiency, and transitioning to more sustainable packaging options are crucial. Some retailers are trialling refill stations to reduce plastic waste, while others focus on locally sourced products to decrease transport emissions. Life-cycle assessment tools can help manufacturers and retailers make informed decisions about the environmental impacts of their products, enabling more sustainable practices throughout the supply chain.
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Transport
The transport sector is a major contributor to global carbon emissions, with road transport being the most polluting aspect of this sector. Cars and vans are the biggest source of transportation emissions, accounting for approximately 48% of global transportation emissions. Since 1990, global transportation CO2 emissions have increased by more than 70%. In 2022, these emissions rose by almost 5%, reaching 7.97 billion metric tons of carbon dioxide.
Road transport is the second-largest contributor to global emissions, after coal-fired power plants. It accounts for about 15% of total CO2 emissions, with cars, light trucks, and heavy-duty trucks being the largest sources of greenhouse gases from transportation. Aviation is also a significant contributor to carbon emissions within the transport sector, accounting for 11.6% of passenger transportation emissions. International and domestic air traffic are major factors in these emissions, with a rebound to pre-2020 levels following the plunge during the COVID-19 pandemic.
The freight transportation sector is another polluting aspect of the transport industry. Initiatives such as the SmartWay program by the EPA aim to improve supply chain efficiency, reduce greenhouse gases, and save fuel costs for participating companies. Postal delivery emissions in the US alone are equal to those from 7 million cars, highlighting the impact of freight transportation.
To reduce emissions, the EPA and DOT have set GHG emissions and fuel economy standards for vehicles. These regulations aim to improve fuel efficiency, reduce America's dependence on oil, and provide savings for consumers. Additionally, the development and adoption of low-carbon fuels, improved vehicle technologies, and strategies to reduce vehicle miles traveled can contribute to lowering greenhouse gases from transportation.
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Construction
One of the most damaging aspects of the construction industry is its consumption of raw materials. The industry uses a large amount of natural resources, with construction accounting for 50% of all natural resource extraction worldwide. This includes the use of materials such as sand and gravel, as well as more energy-intensive resources like concrete and steel. It has been estimated that the construction industry in the UK alone uses around 400 million tonnes of materials every year, with approximately 100 million tonnes becoming waste. This waste contributes to the industry's impact on water, air, and soil pollution, harming local ecosystems and wildlife.
To reduce the environmental impact of the construction industry, it is essential to explore more sustainable practices. This includes adopting more sustainable materials and methods, improving energy efficiency in buildings, and offsetting residual emissions. By implementing these measures, the construction sector can work towards achieving net-zero emissions and reducing its contribution to global pollution.
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Frequently asked questions
The energy industry is the most polluting sector, with fossil fuels like gas, coal, and oil remaining central to daily life in many countries.
The transport industry, manufacturing & construction, fashion, agriculture, and food retail are also major polluters.
Factory pollution has severe health consequences for surrounding communities and can even cause illnesses for people living hundreds of miles away. It contributes to air, water, and land pollution, with toxic chemicals and waste released into the environment.
To reduce factory pollution, there is a need for stricter regulations and accountability for companies, a transition to renewable energy sources, and the implementation of sustainable practices. Communities can also play a role by monitoring and reporting signs of pollution, advocating for change, and supporting sustainable businesses.
