A tree is a tree.
What am I talking about?
Look at the picture below and you will see a beautifully grown tree.
Look carefully if you are convince it is.
Do you see some "rectangular" objects attached along with the leaves?
They are antennae (aerials).
They are used for radio transmission to portable devices.
The "tree" is actually a cellular base station dressed up as a tree.
What a way to blend in communication technology with nature!