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- Our World in Data
- Atmospheric CO2 concentration
Atmospheric CO2 concentration
Our World in Data's line chart drew 21.8K views on X: 0.8x its typical post and #106 of 139 Our World in Data charts we track by views. Read Oct 10, 2026.
How do we track a changing climate?
Why it spread
This post spread because it pairs a self-explaining line chart of atmospheric CO2 over the last 800,000 years with a strong quote rate, drawing 179 likes, 73 reposts, 11 quotes, 27 saves and 21,824 views.
What worked
- The chart explains itself, so readers grasp the long CO2 rise without extra context.
- The post text frames the chart as reaching further back in time than almost any other on the site, which makes it feel distinctive.
- It earned a top quarter quote rate and a top quarter source reach, showing it traveled well beyond the account's usual audience.
What to borrow
We could take one of our own long-run datasets and build a single self-labelling line chart, then open the post by naming what makes that time span unusual.
Careful
Do not copy the exact CO2 framing or assume every long-run chart will travel, since the spread here also depended on strong quoting and a top quarter source reach.
Written by our analysis model from the measured numbers above, not by Our World in Data.
Make it yours
Your numbers, in this line chart.
Starts from the real numbers of "Global atmospheric CO2 concentration has increased dramatically in recent centuries" by Our World in Data. Replace every number with yours before you post. Make one like this, step by step
Free pictures carry a small "Made with ViralChart" line. That line is how other people find us.
API · Max
Use this chart via API
On the Max plan you can pull this chart's numbers with the provenance of each one, as JSON or CSV, with its redraw spec, or call it from an agent over MCP. Chart id e0908540dab0.
Approximate values. Our two readings of this chart agreed only in part (confidence 0.41 of 1), so check the original before you quote a number. The API marks it lowConfidence, and ?min_confidence=0.5 leaves it out.
| Path | Returns | Plan | |
|---|---|---|---|
| GET | /api/v1/charts/e0908540dab0 | Title, publisher, date, form, point count; with a Max key, the data link | Open |
| GET | /api/v1/charts/e0908540dab0/data | Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV | Max |
| GET | /api/v1/charts/e0908540dab0/render?view=1 | The draw-only view this page uses | Open |
| POST | /mcp | Tool get_chart_data with this id, for Claude, Cursor and other agents | Max |
curl -s https://viral-chart.com/api/v1/charts/e0908540dab0/data \
-H "Authorization: Bearer $VIRALCHART_KEY"claude mcp add --transport http viralchart https://viral-chart.com/mcp \
--header "Authorization: Bearer $VIRALCHART_KEY"60 requests a minute per key; over that you get 429 with Retry-After. Up to 5 keys per account, made on your account page and shown once. Without Max, the data route answers 402 with a link to the plans. The numbers describe a chart its publisher owns, and every file carries a license note.
More from Our World in Data
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Other giants using a line chart
All 295
Questions people ask
How far did Our World in Data's "Atmospheric CO2 concentration" chart travel?
21,824 views, 179 likes, 73 reposts and 27 saves on X, read Oct 10, 2026. A normal post from @OurWorldInData gets about 28.6K views.
What kind of chart is it?
A line chart. Global atmospheric CO2 has increased dramatically in recent centuries.
Can I use Our World in Data's chart?
Use the format, not the picture. The chart, logo and design belong to Our World in Data. ViralChart redraws the chart type with your numbers and words, and credits the original publisher.