Meghan Hodges
Smartphones have become a permanent fixture in our daily lives, with global usage almost doubling in the past five years. With over half of the world's population owning a smartphone, it is important to consider the environmental impact of these devices. The manufacturing process of a smartphone accounts for a significant portion of its carbon footprint, with emissions arising from metal extraction, shipping, and production. The mining of precious metals such as gold, tungsten, and cobalt contributes to deforestation, water contamination, and carbon emissions. Additionally, the data centers needed for software development and the usage of smartphones also contribute to energy consumption and carbon emissions. The recycling of phone materials and the growing problem of plastic waste in phone cases further highlight the pollution generated by smartphones. As consumers, we can reduce our impact by extending the lifespan of our devices, choosing eco-friendly alternatives, and supporting sustainable practices in the smartphone industry.
| Characteristics | Values |
|---|---|
| Carbon emissions during manufacturing | High |
| Carbon emissions during usage | Low |
| Carbon emissions during transport | Medium |
| Carbon emissions during recycling | Medium |
| Materials used | Silicone, plastic, iron, aluminium, copper, gold, tungsten, cobalt |
| Environmental impact of materials | Metal extraction induces solid and liquid waste; water contamination; deforestation; damage to wildlife and farmland |
| Data centres | Consume large amounts of energy, contributing to carbon and heat emissions |
| Phone cases | Plastic cases contribute to waste and pollution; non-biodegradable; release harmful chemicals during decomposition |
| Refurbished phones | Extend smartphone life, reducing environmental impact |
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What You'll Learn
Phone manufacturing and mining
The manufacturing process of a smartphone accounts for about 85% of its carbon footprint, making it the most damaging device to the environment. These emissions are mainly attributed to metal extraction, shipping, and production. The production of a typical iPhone 14 still accounts for over 80% of its total carbon emissions.
Smartphone manufacturing facilities are often located in countries that are vulnerable and already bearing the brunt of human-induced climate change, such as China, Vietnam, and India. The expansion of these facilities comes at the cost of replacing rice fields and farmlands. Additionally, the heat generated during the manufacturing process affects both the local communities living near the factories and global populations vulnerable to climate change.
Mining the rare materials inside smartphones contributes significantly to the environmental impact of these devices. For example, graphite mining in China has led to complaints of sparkling night air, damaged crops, soot-covered homes and belongings, and polluted drinking water. The demand for graphite has increased alongside the demand for more powerful smartphones, tablets, and laptops.
Gold mining, another essential aspect of smartphone production, has resulted in deforestation, water contamination, and violence against indigenous people in Brazil, as well as the destruction of the Amazon rainforest in Venezuela. Water bodies near copper mines, primarily in Chile and Peru, have turned reddish after being contaminated, affecting fish, wildlife, and farmland.
Extending the lifespan of smartphones is crucial in reducing their environmental impact. Keeping a smartphone for three years instead of two can significantly reduce an individual's carbon footprint, as it eliminates the need to mine rare materials for a new phone. Longer smartphone lifetimes could also reshape the industry's revenue and profit models, encouraging vendors to offer higher-priced, more sustainable devices.
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Phone disposal and recycling
The manufacturing process of a smartphone accounts for about 85% of its carbon footprint, with emissions coming from metal extraction, shipping, and production. The mining of gold, a metal used in phones, has led to deforestation, water contamination, and violence against indigenous people in Brazil, as well as contributing to the destruction of the Amazon rainforest in Venezuela.
The environmental impact of smartphones doesn't end with their production; the carbon footprint, heat emissions, and environmental pollution are also caused by the mass production of their physical components. The networking and data centers needed for the software development of smartphone operating systems also contribute significantly to carbon emissions.
The disposal and recycling of phones are crucial in reducing the environmental impact of smartphones. Electronics and their batteries are illegal to dispose of in the trash in some states due to the toxic substances they contain. Batteries, in particular, can be hazardous. It is recommended to deactivate your phone service, remove any personal data, and perform a factory reset before recycling a phone.
There are several options for recycling old mobile phones and helping to reduce the environmental impact of smartphones. Some companies, such as Best Buy and Staples, offer in-store recycling programs and work with recycling partners to ensure that phones don't end up in landfills. Eco-Cell, a Louisville, Kentucky-based e-waste recycling company, partners with nonprofits and businesses to collect phones from bins located in coffee shops and other businesses. They resell reusable phones and recycle those that are not, paying the owner for the value of the recycled materials.
Gazelle, with locations in Boston, Louisville, and Texas, is another popular trade-in option for old cell phones. Medic's Phone Donation Program allows individuals, nonprofits, groups, or businesses to donate old phones, which are then recycled or resold, with the profits going towards new technology for the nonprofit. Cell Phones for Soldiers is another nonprofit that provides cost-free communication services to active-duty military and veterans, with proceeds from donated phones going towards purchasing international calling cards.
EcoATM, with over 6,500 kiosks across the U.S., offers an easy way to sell old phones and get paid in cash on the spot, helping to keep electronic waste out of landfills.
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Phone usage and data centres
The environmental impact of smartphones is significant, and it extends beyond the emissions-intensive manufacturing process. The carbon footprint of a smartphone is about 70 kg of CO2 per year, and the average Brit will own their phone for about 71 years, resulting in a total of 4,970 kg of CO2 emissions over their lifetime. According to researchers from McMaster University in Canada, carbon emissions linked to smartphone use have increased from 17 megatons of CO2e per year to 125 megatons of CO2e per year, surpassing emissions from PCs or laptops.
Data centres, which are essential for software development and operating systems like iOS and Android, are energy-intensive. They consume approximately 200 terawatt-hours (TWh) of electricity, contributing to nearly 1% of global electricity demand and 0.3% of global CO2 emissions. The transition to a more digital world, including the use of digital currencies, artificial intelligence, and machine learning, further exacerbates energy consumption and emissions.
To reduce the environmental impact of phone usage and data centres, several measures can be implemented. These include using wi-fi instead of mobile networks, disabling unnecessary cloud backups, and opting for mobile network calls over internet calls. Additionally, simple tweaks like lowering the autoplay resolution and being mindful of device lifecycles can help reduce energy consumption and dependence on data centres.
The refurbished smartphone market offers a more sustainable alternative, as it extends the lifespan of devices and reduces the need for new device manufacturing, which accounts for 85% of a smartphone's carbon footprint. By 2025, the refurbished smartphone market is projected to reach 351.6 million units, promoting cost efficiency and environmental benefits.
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Phone cases and plastic waste
Plastic phone cases have become an integral part of smartphone ownership. However, they have a significant negative impact on the environment and human health. Over 1.6 billion plastic phone cases are discarded in landfills and oceans annually, contributing to the growing problem of plastic waste. This number is alarming, especially considering that plastic phone cases are often used for a short period before being discarded as consumers switch to new designs or upgrade their devices.
The lifecycle of plastic phone cases starts with the extraction of non-renewable raw materials such as oil and natural gas, which are finite resources. The extraction and processing of these resources for plastic phone cases consume energy and contribute to climate change. After extraction, the materials are transported to a manufacturing facility, where they are processed and made into plastic phone cases using energy and harmful chemicals. The manufacturing process releases toxic chemicals, including solvents, plasticizers, and colorants, into the air, water, and soil near the factory due to emissions and runoff.
Once the plastic phone cases are produced, they are transported to retailers for sale. Many of these cases end up in landfills or oceans, taking hundreds of years to decompose and releasing harmful chemicals into the environment during this process. Plastic cases that end up in oceans and waterways can harm marine wildlife, contributing to plastic pollution. Marine animals often mistake plastic debris for food, leading to injuries and death. Plastic debris can also entangle marine animals, making it difficult for them to move and survive.
The good news is that consumers now have sustainable alternatives to traditional plastic phone cases. Companies like Pela offer compostable phone cases made from sustainable materials such as flax shive and plant-based polymers. These cases are just as durable as plastic ones and do not come with the same environmental and health risks. By choosing compostable phone cases, consumers can protect their phones and the planet simultaneously.
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Phone usage and carbon footprint
Mobile phones contribute to our carbon footprint, which is the total amount of carbon dioxide and other greenhouse gases emitted by a person, company, event, or product. The manufacturing process of a smartphone accounts for a large portion of its carbon footprint, with emissions arising from metal extraction, shipping, and production. The mining of precious metals like gold, tungsten, and cobalt for smartphones has led to deforestation, water contamination, and environmental degradation.
The carbon footprint of phone usage is also significant. Data centers needed for software development and handling phone traffic contribute to carbon and heat emissions. Extending the lifespan of smartphones, using recycled materials, and reducing energy consumption during phone usage can help lower the carbon footprint.
The frequent release of new smartphone models encourages the quick discarding of older phones, and the lack of transparency around recyclability further exacerbates the issue. However, some manufacturers are making efforts to improve, with Apple transitioning to clean energy for its global facilities.
The choice of phone cases also impacts the environment. Plastic phone cases contribute to pollution and waste, often ending up in landfills or oceans, harming marine wildlife. Sustainable and eco-friendly alternatives, such as cases made from recycled materials, can help reduce environmental impact and support a circular economy.
While the exact amount of pollution generated by a single phone may vary, it is clear that phone usage and the broader smartphone industry have a significant carbon footprint. To reduce their impact, consumers can make mindful choices about their phone's lifecycle, energy consumption, and the materials used in accessories like phone cases.
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Frequently asked questions
The carbon footprint of a phone is the total amount of greenhouse gases emitted, expressed as carbon dioxide or CO2 equivalent emissions (CO2e). The manufacturing process of a smartphone accounts for about 85% of its carbon footprint, with emissions coming from metal extraction, shipping, and production.
The mining of precious metals and earths such as gold, tungsten, and cobalt is a carbon-intensive process that contributes significantly to the carbon footprint of a phone. Metal extraction induces massive solid and liquid waste.
To reduce the pollution generated by your phone, you can extend its lifespan by repairing and replacing individual components rather than discarding it for a new model. You can also reduce your carbon footprint by using less energy during phone usage and by choosing a phone case made from recycled materials.
