Marc Shapiro is the Director of the Breakthrough Energy Contrails team, one of American’s partners on contrail avoidance. Below, he answers our questions on the science behind contrail avoidance ...

According to a comprehensive modeling study, the climate benefits of contrail avoidance depend on speed, not perfection ...

Most of us first spot them as children—the white lines in the blue sky that are the telltale sign of a flight overhead. Contrails are an instant visual reminder of air travel, and a source of much ...

Reducing the climate impact of contrails and other non-CO2 emissions from aircraft engines hinges on getting a more complete understanding of how these form. © Airbus ...

Contrails vs. chemtrails: What Alabama’s new weather bill actually bans ...

If you took a gander at the sky on Tuesday in southern Ontario, you will have noticed some different kind of clouds that you don't see every day. Aside from the pleasant appearance of the sunshine and ...

Some contrails can contribute to global warming. Contrails—pure ice clouds (“cirrus”) that form from aircraft exhaust under specific cold conditions—can trap heat in the atmosphere, sometimes creating ...