Pilot-Scale Burns (IMAGE) Proceedings of the National Academy of Sciences Caption Pilot-scale burns of 100 kg piles of Chamise indicating that piles treated with viscoelastic fire retardant fluids weathered extensively and exposed to the environment burn slower than untreated piles. The images were taken 1 min after ignition. Credit Image courtesy of Jesse D. Acosta. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.