Personally I feel that Electro-Magnetic field is also being used by life to communicate on one to one basis ...
Currently all known natural way of communication involve some kind of medium....
Etheral coomunication has not been detected.. but I think it should be the case because this is the most efficient way to communicate naturally..
However I must also admit that we have are actually using this means in a more visible way by inventing new devices....
Eco-friendly mobile is what I am looking for..