Are the Base Transceiver Stations (BTS) safe?

The BTS is the interface between the mobile phone and the rest of the network. Are the transmissions from the BTS safer to human beings around it? The BTS transmits a constant power of about 50 Watts. The strength reduces rapidly as the distance from the BTS increases. For example, at a distance of 4 meters from the BTS, a power of 50 watts from the BTS shall have reduced to 3.125 watts (Inverse square law)

This makes the power transmitted from the BTS to be very little, just a few meters away and hence

 quite harmless. The mobile phone sensitivity ( the smallest signal strength that can be detected by a phone is very small, around -120dBm ( or 0.001nW) and therefore the mobile phones can still communicate at quite some distance from the BTS.

Compare this with a power of around 0.003 watts transmitted by the mobile phone (which most of the times is very close to our body) . Or the wireless router transmitting a power of around 0.1 watts and usually placed indoors in the office or homes. Worse still is the Microwave oven transmitting between 700 watts and 1200 watts (But luckily, it has a shield protecting the users against such high power waves, unless it has a leakage, but its use is also intermittent).

Radiation from the BTS therefore does not pose any danger compared to the existing typical radiating equipments.