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Compare the carbon footprint of buying a new smartphone versus a refurbished one. See manufacturing emissions data from Apple, Samsung, and Google.
Manufacturing a new smartphone produces 70–80 kg CO2e (Apple reports 61–83 kg for recent iPhones). A refurbished phone produces just 5–10 kg CO2e (from refurbishment, testing, and transport). Buying refurbished saves approximately 85–90% of the carbon emissions.
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Over 80% of a smartphone's lifetime carbon footprint comes from manufacturing — not from using it. Mining rare earth minerals, manufacturing chips, assembling screens, and global shipping all contribute to a carbon footprint of 70–80 kg CO2e per device. By contrast, charging and using a phone for a year adds only about 5 kg CO2e. This means the most impactful decision isn't how you use your phone, but how often you replace it.
A refurbished phone undergoes testing, cleaning, and minor repairs — processes that produce just 5–10 kg CO2e. This extends the original device's useful life by 2–3 years, effectively spreading the original manufacturing emissions across more years of use. If 10% of global smartphone buyers chose refurbished instead of new each year, it would prevent approximately 3 million tonnes of CO2e.
Refurbished phones fall into several grades. Grade A (like-new, minor or no scratches), Grade B (light visible wear), and Grade C (clear cosmetic wear but fully functional). All legitimate refurbished phones undergo factory reset, hardware testing, battery assessment, and component replacement where needed. Certified refurbished schemes from Apple, Samsung, and third-party specialists like Back Market carry warranties of 12–24 months. The battery — the component most likely to degrade — is often replaced, giving the device a fresh usage lifespan. A reputable Grade A refurbished phone is functionally indistinguishable from new.
Since 80%+ of a phone's lifecycle emissions occur at manufacturing, the single most effective strategy is keeping your phone longer. Extending replacement from 2 years to 4 years roughly halves your annual phone-related carbon footprint. Going to 6 years reduces it by two-thirds. Modern flagship phones from 2019+ receive software updates for 4–6 years (Apple) or 4–7 years (Samsung Galaxy). With a protective case, screen protector, and occasional battery replacement (~£50), a 4–5 year phone lifespan is entirely achievable — and saves 40–60 kg CO2 over a 2-year upgrade cycle.
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