Blue Lines
Joachim MajholmBlue Lines is a nonprofit founded to spread awareness of the climate impact of aviation condensation trails, and to speed up the implementation of contrail avoidance to avoid 1-2% of climate change.
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 45 | Founded | 3 years ago | Last Issue | 8 days ago |
| Active | |||||
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bluelines.substack.comLatest Issues
✈️ The contrail avoidance playbook for airlines is out
Today, Blue Lines releases Contrail Avoidance in Practice: A Playbook for Airlines — a free guide to implementing contrail avoidance trials at an airline.
Contrail warming is one of aviation’s largest climate problems and one of the most a...
✈️ Why the next 18 months for contrails really matter
Contrails over the Golden Gate Bridge in San Francisco, CA on April 7, 2026.
The results of the first year of the European Union’s mandatory reporting of contrail warming (and other non-CO₂ effects) should soon be made public. For the firs...
✈️ Can airlines avoid contrails? American Airlines just ran one of the biggest tests yet.
A new study released this week describes one of the largest real-world tests of contrail avoidance conducted, and the results offer one of the clearest signals yet that airlines can reduce contrail warming using existing flight-planning too...
✈️ The greatest contrail climate risk is to do nothing 🛑
Fresh contrails cross older ones over the Sierra Nevada in California.
Four recent papers tell some interesting stories about contrail avoidance right now:
Transport & Environment’s new report shows how concentrated contrail warming reall...
✈️ Contrail predictions for 2026 🔮
We have said it before: Attempting to predict the future is an awful business. If you’re right, it seems obvious in hindsight, and if you’re wrong, you’re an idiot. Nevertheless, we are making predictions now for the third year in a row, so...
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| Subscribers | Engagement | 59 | Monthly Web Visits | ||
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