Carbon Footprint of Facebook
IdleForest models one hour of Facebook use at about 65g of CO2.
Facebook combines feed browsing, images, autoplay video, groups, ads, marketplace browsing, and messaging, so its footprint is higher than text-only social use but lower than continuous HD streaming.
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How this Facebook estimate is built
The estimate treats Facebook as a media-rich social feed where autoplay, image loading, ads, and long mobile sessions are the main drivers.
- The 65gCO2e/hour estimate is based on a mixed social-media hour with meaningful image and video density.
- The yearly estimate uses 65gCO2e/hour x 1 hour/day x 365 / 1000 = 23.7kgCO2e/year.
- Tree offset math rounds 23.7kgCO2e/year divided by 20kgCO2e per tree-year up to 2 trees.
Calculation proof
How the estimate is calculated
Annual footprint formula
65g CO2e/hour x 1h/day x 365 / 1000 = 23.7kg CO2e/year
Tree offset formula
ceil(23.7kg CO2e / 20 kg CO2e per tree-year) = 2 rounded up
Source basis: This estimate combines the app's modeled hourly footprint, usage assumption, methodology notes, and linked research sources. It is directional and should be read as a transparent consumer estimate, not a vendor emissions disclosure.
What drives this estimate most
- Autoplay, recommendation loops, and image/video-heavy feeds extend session length.
- Short-form video often behaves more like streaming than lightweight browsing.
- The device and network layer still matter even when individual interactions feel small.
Assumptions and boundaries
- The estimate reflects active social-media use over time rather than a single refresh.
- It bundles app-side, network-side, and device-side energy demand into one consumer footprint.
- The number is most useful for comparing habits and platforms.
Uncertainty note: Social-media footprints vary with media density, autoplay behavior, device, and the amount of video in the feed.
Yearly Impact Comparison
*IdleForest offsets ~200kg CO2/year on average per user.
Ways to reduce this footprint
- Disable autoplay and cut accidental scroll time where possible.
- Use smaller devices and lower brightness for casual sessions.
- Set app time limits if recommendation loops are extending usage.
Estimate review
Who reviewed this estimate
Reviewed by: IdleForest Research Team
Role: Editorial Review
Organization: IdleForest
Last reviewed: May 10, 2026
These estimates are meant to help compare digital habits. They are directional, not exact reproductions of proprietary vendor accounting.
Sources
Nature Communications: The environmental sustainability of digital content consumption
Peer-reviewed life-cycle assessment covering web use, social media, video, music streaming, and video conferencing.
Carbon Trust: Carbon impact of video streaming (PDF)
Useful benchmark for streaming emissions and the role of the viewing device.
MIT CEEPR: How much can we reduce CO2 by planting trees?
Supports the offset conversion used by IdleForest: roughly 20kg CO2 absorbed per mature tree per year, with wide real-world variation.
More questions about Facebook's carbon footprint
Why is Facebook higher than messaging apps?
A typical Facebook session loads more images, video, ads, and recommendation content than a plain messaging session, increasing network and device-side energy.
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About IdleForest
IdleForest is a passive browser extension that plants trees while you browse, game, or stream. It uses your unused internet bandwidth to fund reforestation projects.
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