In this session, Marc Shapiro, Executive Director at Contrails.org, walks us through the science of contrail warming, approaches to navigational avoidance, and the current barriers to making contrail avoidance a standard practice in global aviation. We explore contrail avoidance as a potential pathway to quickly counter warming considering persistent contrails cause roughly the same warming as 33 billion tonnes of atmospheric CO₂. Most of this warming can be avoided through small adjustments to flight altitudes or routes, at negligible cost to airlines. Despite this opportunity, contrails remain largely unaddressed.