Live atmospheric CO₂ readings from NOAA's Mauna Loa Observatory displayed in your QuickSheet terminal spreadsheet or desktop wallpaper.
Free, no API key required. Data sourced directly from NOAA's public dataset.
co2: current → current ppm, baseline comparison, year-over-year, 7-day trend
co2: trend → last 30 days of readings with daily changes
co2: stats → record highs/lows and annual averages by year
🟠 CO₂ — Mauna Loa Observatory
Current Level 432.04 ppm
vs Pre-Industrial +152.04 ppm (54.3% ↑)
Year-over-Year +3.12 ppm
Date 2026-05-17
7-Day Trend ▄▅▄▆▅▆▅
Source: NOAA GML, Mauna Loa, HI co2: trend | co2: stats
Status indicators:
| Icon | Meaning |
|---|---|
| 🟢 | Below 400 ppm |
| 🟡 | 400–420 ppm |
| 🟠 | 420–450 ppm |
| 🔴 | Above 450 ppm |
# In QuickSheet, type in any cell:
ext: github:Deskworks/quicksheet-co2
# Then use the prefix in another cell:
co2: current- QuickSheet (any platform)
- .NET 9 SDK
- Internet access (fetches NOAA GML CSV)
Data comes from NOAA Global Monitoring Laboratory, Mauna Loa Observatory, Hawaii. Daily measurements have been recorded since 1958.
The pre-industrial baseline used is 280 ppm (circa 1750).
Implements the QuickSheet Extension Protocol. Reads JSON-lines from stdin, writes cell updates to stdout.
Part of the QuickSheet extension ecosystem.