OLD CELL PHONES!
This is actually a really cool TED talk, given by Topher White.
According to White, it’s hard to hear anything that goes on in the rainforest this explains why there is so much illegal logging going on that isn’t heard and then isn’t able to be stopped.
I really just like that this idea is so simple. It recycles old cell phones and uses the cell phone signals that are already there in order to stop the illegal logging. The design White uses is also inventive in that it takes into consideration the movement of the sun and the leaves of the trees.
Just think about all he other inventions we can create using recycled materials…