<P> Experts consulted by France considered it was mandatory that the main antenna axis should not to be directly in front of a living place at a distance shorter than 100 metres . This recommendation was modified in 2003 to say that antennas located within a 100 - metre radius of primary schools or childcare facilities should be better integrated into the cityscape and was not included in a 2005 expert report . The Agence française de sécurité sanitaire environnementale (fr) as of 2009, says that there is no demonstrated short - term effect of electromagnetic fields on health, but that there are open questions for long - term effects, and that it is easy to reduce exposure via technological improvements . </P> <P> In order to protect the population living around base stations and users of mobile handsets, governments and regulatory bodies adopt safety standards, which translate to limits on exposure levels below a certain value . There are many proposed national and international standards, but that of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) is the most respected one, and has been adopted so far by more than 80 countries . For radio stations, ICNIRP proposes two safety levels: one for occupational exposure, another one for the general population . Currently there are efforts underway to harmonise the different standards in existence . </P> <P> Radio base licensing procedures have been established in the majority of urban spaces regulated either at municipal / county, provincial / state or national level . Mobile telephone service providers are, in many regions, required to obtain construction licenses, provide certification of antenna emission levels and assure compliance to ICNIRP standards and / or to other environmental legislation . </P> <P> Many governmental bodies also require that competing telecommunication companies try to achieve sharing of towers so as to decrease environmental and cosmetic impact . This issue is an influential factor of rejection of installation of new antennas and towers in communities . </P>

What is the side effect of mobile tower