We can drastically cut aviation's climate impact.
The Problem

Contrails cause

1-2% of global warming.

We can eliminate most of that at near-zero cost.


Aircraft cause warming in two ways: greenhouse gas emissions and contrails. That's because contrails (aircraft condensation trails) often grow into cirrus clouds that trap heat in the lower atmosphere and significantly add to global warming. Recent estimates show that contrails cause about the same amount of warming each year as all the CO2 emitted by all flights from 1945 to 2018.

The Solution
Adjusting 5% of flights could avoid up to 80% of contrail warming.

Using weather forecasts, satellite imagery and other data, we can model, detect, and avoid contrails just like turbulence, icing, or storms. We are advancing science and building contrail management systems that can be used by the aviation industry to significantly reduce their climate impact, immediately.

Learn MoreArrow to About Page
By The Numbers
5%
Number of planes slightly redirected to avoid producing the most harmful contrails
80%
Portion of contrail climate warming avoided by re-routing 5% of planes
< 1$
Average cost of avoiding warming equivalent to one tonne of CO2
Days
Amount of time it takes to get the full cooling effect for avoiding contrails
Who We Are
Photograph of contrails in the sky

Contrails.org is a science-led non-profit that exists to propel contrail research into climate action.


Originating from a small working group at Breakthrough Energy, Contrails.org is a team of scientists, technologists, and policy experts working in collaboration with the aviation industry, academic partners, policymakers and civil society. Together, we are catalyzing the research, innovations and incentives needed to make contrail management a practical reality.

Learn MoreArrow to About Page
Explore the contrails map
Contrails LogoOur contrail map shows you how contrail-induced cirrus clouds are warming the planet. Learn whether your recent flight created harmful contrails, see how small changes to flight paths can prevent contrails, and more.Learn MoreArrow to About Page
Contrails in the press
CNN Press Logo
Nature Press Logo
Boston Globe Press Logo
Wired Press Logo
Wall Street Journal Press Logo
National Geographic Press Logo
BBC News Press Logo
MIT Technology Review Press Logo
Explore the contrails map
Contrails LogoOur contrail map shows you how contrail-induced cirrus clouds are warming the planet. Learn whether your recent flight created harmful contrails, see how small changes to flight paths can prevent contrails, and more.Learn MoreArrow to About Page
Contrails in the press
Wired Press Logo
National Geographic Press Logo
MIT Technology Review Press Logo
CNN Press Logo
Nature Press Logo
Boston Globe Press Logo
Wall Street Journal Press Logo
The Washington Post Press Logo
BBC News Press Logo