Using pointed metal cones that rapidly biodegrade, tree bombs bury themselves at the same depth as if they were planted by hand. Each cone contains fertilizer and a special material that absorbs nearby moisture, which provides water to the roots of the tree.
Writes Brian Merchant for TreeHugger:
“It turns out that there are all these military planes just idling in hangars across the world — they were designed to drop landmines en masse in enemy territory, but now they’re just collecting rust. There are some 2,500 of these planes in 70 different countries, and it turns out they make for ideal tree-bombers.”
“The Royal Thai Air Force loaded the seed bombs into a plane and dropped them over 5,000 rai of a wildlife sanctuary in Phitsanulok province. Seeds from local plants including phayungs, maka mongs and kaboks have been dropped with the aim of regenerating the area and transforming it into a healthy, green forest by 2017.”