A weather-resistant fluid containing fire retardants can be sprayed onto vegetation to stop wildfires from starting at high-risk areas such as roadsides
Source:
https://www.newscientist.com/article/2218011-sticky-fluid-can-be-sprayed-on-grassy-verges-to-prevent-wildfires/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home