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LM: #318: Carbon pomodoro

June 02 2025 – 10:00am

Need a break? Maybe it’s not time, but air quality.

I recently tried monitoring the air quality in my home office with an air quality meter (bought on Amazon). I’ve since developed a new routine that helps me stay focused.

Surprisingly, even in an 11-foot square room, with vaulted ceiling, my own breathing increases the CO₂ levels quickly. I’m above 1,000 ppm within a couple hours.

If I step outside, or even stick my head out the window, I can instantly think more clearly.

One study has found that a CO₂ level above 1,000 ppm reduced six of nine measures of decision-making performance.

So I’ve started working in oxygen intervals. Once the meter reaches 1,000 ppm, I open a window and take a quick walk. Fifteen minutes later, the CO₂ level is back below 600.

Even if you don’t have a meter, you may find you think better with a little fresh air.

Book: Time Anxiety (Amazon) is Chris Guillebeau’s guide to overcoming the illusion of urgency.

Cool: The Librarian saves time on emails, scheduling, and finding information, through WhatsApp and Slack.

Best,
David
P.S. The 100 Journal Prompts Workbook is now available on Amazon paperback.

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