G Norris, Calls to action on cutting contrails grow, Aviation Week Network, 29 August 2025

In UK, Cambridge University together with Imperial College, the U:S Breakthrough Energy, International Council on Clean Transportation and the South African University of Pretoria have issued a report establishing ‘living laboratories’ comprising large airspace blocks in which investigative procedures can be tested. For every year of delay, the world will be approximately 0.004K hotter in 2050.