The Carbon Footprint of Streaming
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Streaming generates carbon—but less than you probably think. And far less than the device you’re watching on.
Dear IMPT Family,
Here’s a question that regularly surfaces in climate discussions: How much carbon does watching Netflix generate? Does streaming have a measurable climate impact? And should climate-conscious people feel guilty about their viewing habits?
The honest answer is more complicated than it sounds. Yes, streaming generates carbon. No, it’s not your biggest climate lever. And worrying excessively about Netflix viewing is probably a distraction from higher-impact choices.
Here’s the actual math.
🔥 Key Highlights 🔥
1️⃣ Streaming generates roughly 0.03–0.15 kg CO₂ per hour, depending on quality and network
2️⃣ Video transmission is roughly 0.04–0.15 kg CO₂ per hour; data centre processing adds to it
3️⃣ Electricity source matters: streaming powered by renewables is roughly 10x cleaner than coal-powered grids
4️⃣ 4K streaming generates 3–4x more carbon than 720p, but most of us don’t notice the difference
5️⃣ The real carbon is in the device, not the service—a new TV purchase generates more emissions than years of streaming
1️⃣ The Carbon Sources
Streaming’s carbon comes from three places:
✔ Network transmission: Data travels from Netflix’s servers through your ISP’s network to your home. This requires electricity at routing points, switches, and your home router.
✔ Data centre processing: Netflix (and similar services) run on server farms. These are enormously power-hungry, though mostly for storage and processing, not per-stream serving.
✔ Your device: The device itself was manufactured (large embodied carbon) and requires electricity to run. This is the biggest per-hour carbon source.
2️⃣ The Network and Server Numbers
Research from the ICT sector suggests that video streaming generates roughly 0.02–0.05 kg CO₂ per hour of transmission and processing (often cited as 0.04 kg CO₂/hour as a rough estimate). Add in end-device electricity consumption, and you’re at 0.05–0.15 kg CO₂ per hour.
For context: an hour of Netflix costs roughly 0.05–0.15 kg CO₂. A 10-hour binge generates 0.5–1.5 kg. A month of daily streaming (30 hours) generates 1.5–4.5 kg CO₂.
3️⃣ The Device is the Big Carbon
Here’s the crucial part most people miss: the carbon embedded in manufacturing your TV or laptop—the device you’re watching on—dwarfs the streaming carbon.
A 55-inch 4K TV generates roughly 400–600 kg CO₂ during manufacturing. An average TV is replaced every 7–8 years. That’s 50–75 kg CO₂ per year just from the device’s embodied carbon—hundreds of times higher than the streaming itself.
A laptop: roughly 300 kg CO₂ in manufacturing, amortised over 4–5 years of use, is 60–75 kg CO₂ per year.
A smartphone: roughly 50–100 kg CO₂ manufacturing, over 3–4 years, is 12–30 kg CO₂ per year.
The device’s manufacturing is the climate story. Streaming on that device is footnotes.
4️⃣ Resolution Matters (But Not As Much As You Think)
4K streaming consumes 3–4 times more bandwidth and energy than 720p. But unless you’re streaming on a large TV, you likely can’t perceive the difference. Switching from 4K to 1080p or 720p reduces streaming carbon by roughly 70–80%.
Netflix automatically adjusts resolution based on your connection. If you’re on cellular or weak Wi-Fi, you’re probably streaming 480p–720p already. On a laptop or small phone screen, this is visually indistinguishable from 4K.
If you’re climate-conscious about streaming, use your device’s settings to cap resolution at 1080p. You’ll save carbon and won’t notice the quality loss.
5️⃣ The Grid Matters Enormously
Streaming powered by renewable electricity (hydro, wind, solar) generates 1/10th the carbon of streaming powered by coal. A Netflix subscriber in Iceland (nearly 100% renewable electricity) has a streaming footprint roughly 10x lower than one in Poland (coal-heavy grid).
You have some control here: use Wi-Fi over cellular (cellular towers use more power per transmission). Stream during off-peak hours when some grids favour renewable sources. In time, as electricity grids decarbonise globally, streaming’s carbon will follow.
6️⃣ The Download vs Stream Question
Downloading a video file (via torrent or service) generates carbon during the download. Streaming generates carbon continuously while viewing. For single viewing, streaming is roughly equivalent to downloading—similar total carbon. For rewatching (watching a show twice), downloading becomes better per view. But most people don’t rewatch; streaming is efficient for single consumption.
7️⃣ The Broader Context
An hour of streaming generates 0.05–0.15 kg CO₂. An hour of air-conditioned office work, in a typical building, generates 0.5–2 kg CO₂ (depending on climate and building efficiency). A car commute generates 0.2–0.5 kg CO₂ per hour. A plane flight generates 50–200 kg CO₂ per hour of flight.
Streaming is not carbon-free, but it’s among the lower-impact digital activities available.
Looking Ahead — Stop Doomscrolling About Streaming
Streaming has a measurable carbon footprint, but it’s small compared to device manufacturing, transportation, heating, and electricity for work. Worrying excessively about Netflix watching is often a distraction from higher-impact choices. If you want to reduce your streaming carbon, cap resolution at 1080p and use Wi-Fi. Beyond that, your climate effort is better focused on device lifespan (keep your TV and devices longer), transport (fly less, drive less), and home energy (heat less, switch to renewables).
Let’s keep building — together. 🌍💚
