This could actually be a great though experiment questions.
Tesla would disagree with everyone's answers and find a great way to change the way we design antenna towers and totally redesign our form of long distant communication to be more energy efficient and less EM pollutant
The truth is the tower expands a good deal of energy, but it's radiated out in the shape of a bloom, like giant flower petals. The dispersion of this energy is what makes it difficult to concentrate and re-collect. In fact the amount of energy that is used by detection is small, meaning that most of the energy dispersed in actually lost or conducted else where probably >80-95% totally lost to achiever average coverage
Now imagine if we have some sort of EM net that, some macro resonant Faraday cage that has the ability to harness back even 80% of all the power admitted out from all EM radiation, this would not only recycle back energy, it could be used to protect against EM pulses, and other form of EM harvesting as our Ozone continues to deplete and other form of solar EM radiation that's not within the infrared to ultraviolet get penetrated onto the earth's surface, or some perhaps even that who escape our earth natural protective magnetic field, the application would be a theoretical break through.....or even better we create more resonance devices so that only what's needed is used, like I say the thought experiment of how we can recycle EM energy is something that few have explored enough till we have found radical natural solutions ......like good old Nikola Tesla