It has been a long way and an enormous distance from communicating through smoke clouds or wireless headsets. We could surely say that our means of communications have improved some over the last decades or so. Neither clouds nor blue tooth leave the atmosphere healthy and unharmed though. In one case humanity suffered from air pollution and the other subjects us to radiation of sorts.
My grand-dad used to say, us humans are the most resistant weed that has ever grown on this planet and there won´t be nothing besides ourselves that has the strength to kill us. Ever. I draw my reassurances from his words on a daily basis when slipping on my blue tooth headsets for work in the office. A call center, to be precise. We all wear them here.