Streaming feels environmentally neutral, doesn’t it? No plastic cases, no delivery trucks, no physical waste. Just ones and zeros floating through the air to your screen. That’s the appeal and the deception.

Every stream requires data centres, network infrastructure, and device power. All of it adds up to a carbon footprint that’s bigger than you’d think, though perhaps not as catastrophic as some headlines suggest.

What the Data Shows

A 2020 study from the IEA found that streaming a half-hour show produces around 35 grams of CO2. That’s roughly the same as driving 200 meters in a typical car. Not nothing, but not exactly setting the world on fire either.

The problem is scale. When billions of people stream billions of hours of content, those grams become millions of tonnes. Netflix alone accounted for nearly half a million tonnes of CO2 in 2020, roughly equivalent to driving 400,000 cars for a year.

But context matters. That’s still a fraction of what aviation or beef production generates. We’re talking about a real issue, not the primary driver of climate change.

Where the Energy Goes

Data centres are the obvious culprits. These massive server farms require enormous amounts of electricity to run the computers and even more to keep them cool. The good news? Major tech companies are investing heavily in renewable energy. Google claims its data centres run on carbon-free energy 90% of the time. Amazon Web Services is aiming for 100% renewable by 2025.

Network infrastructure—the cables, routers, and cell towers moving data around—uses significant energy too. This is harder to optimize because it’s distributed across thousands of companies and millions of devices.

Your device matters more than you’d think. Watching on your phone uses less energy than your TV, which uses less than your gaming console. And older devices are generally less efficient than newer ones.

The Resolution Question

Here’s something concrete you can control: video quality. Streaming in 4K uses roughly four times the data of 1080p, which uses about three times the data of standard definition.

Do you really need 4K? On a phone, probably not. On a laptop, the difference is minimal. Even on a large TV, unless you’re sitting quite close, the improvement isn’t dramatic.

Dropping from 4K to HD could cut your streaming-related emissions by 75%. That’s not negligible.

The Comparison Game

Compared to physical media, streaming looks pretty good—until you account for rewatching. Buying a DVD has upfront environmental cost (manufacturing, shipping), but you can watch it infinite times with no additional impact. Streaming that same movie repeatedly generates new emissions each time.

For something you’ll watch once, streaming wins. For your comfort movie you’ve seen 20 times? Physical media might actually be greener. Or just download it when you know you’ll rewatch.

What Actually Helps

Download instead of stream when you know you’ll watch offline anyway. Your flight entertainment doesn’t need to come from the cloud while you’re at 35,000 feet.

Audio-only when video doesn’t matter. Podcasts and music consume far less data than video. If you’re just listening while working, don’t stream the video version.

Adjust defaults. Turn off autoplay. Stop streaming 4K by default if HD looks fine to you. These settings save data and energy with zero sacrifice in experience for most use cases.

The Bigger Picture

Should you feel guilty about streaming? Not really. Should streaming services do better? Absolutely.

The real wins come from infrastructure improvements and renewable energy adoption, not from individual streaming choices. But that doesn’t mean your choices are meaningless. A million people making small adjustments creates real impact.

Companies respond to what users care about. If enough people choose lower-resolution streaming or audio-only options, that signals demand for more efficient services.

Keep Perspective

Climate anxiety is real, and it’s easy to feel overwhelmed by the environmental cost of everything we do. But streaming isn’t the villain here. It’s a small piece of a much larger puzzle.

The environmental cost of streaming is worth being aware of. Worth making some simple adjustments for. Not worth losing sleep over.

Make the easy changes. Advocate for better corporate practices. But don’t stop enjoying your shows. That’s not the trade-off we need to make.