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This Gel Could Prevent Wildfires.
The nontoxic, biodegradable gel can be sprayed on vegetation as a long-term fire retardant.
The gel is based on cellulose, plant fiber, and uses materials already approved for use in food, drug, cosmetic and agricultural products. It will last through an entire fire season, then slowly degrade. It can be sprayed by a firefighter on the ground or in larger amounts from a plane or helicopter.
https://www.smithsonianmag.com/innovation/gel-could-prevent-wildfires-180973278/