This is how trees can call the police if they’re in danger of being chopped down! Tree are cut down illegally all the time. In fact, up to 90% of rainforest logging is illegal. So the Rainforest Connection created a system to help protect forests. They put phones in the tops of trees with solars panels and a powerful microphone, that can listen constantly for any sound of illegal logging, or other things that could threaten the forest. The very moment a chainsaw is used in the forest, the sound is picked up by the phones, and an alert is sent to local partners who can intervene immediately and halt the logging. The entire process happens in a matter of minutes! The devices cost very little too and have no negative ecological impact on the forest, and can detect chainsaw noises up to 1km in the distance. The devices have been used to help protect a variety of precious wildlife, such as Gibbons in Indonesia, and have helped local people fight deforestation.