One action for today
Skip one short car trip
Replace a single round trip under 5 km with walking, cycling, or transit. The average passenger vehicle emits about 251 g CO2e per kilometre — a 5 km swap saves roughly 2.5 kg today.
tanso.day
Carbon · Daily
Today’s atmospheric carbon
0.00
ppm
↑ +0.00 vs yesterday
Mauna Loa baseline · Pre-industrial 280 ppm · 1.5°C threshold ≈ 430 ppm
Atmospheric CO2 continues its steady upward trend. Today’s reading marks a measurable shift from yesterday — small in isolation, monumental in accumulation. Each ppm represents roughly 7.81 gigatonnes of carbon added to the atmosphere.
Past 30 days
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—
today
- 30d high
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- 30d low
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- 30d avg
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- YoY
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- 280 ppm · pre-industrial baseline (1750)
- 350 ppm · safe operating boundary (Hansen)
- 430 ppm · 1.5°C carbon budget threshold
- 560 ppm · doubling of pre-industrial CO2