There is a lot of paranoia surrounding cell towers s and possibly human health risks. What is important to understand is that radio frequency field intensity is related to the inverse of the distance squared. The exposure that you get from being in the vicinity of a cell tower is hundreds of times lower than the exposure you get using a cell phone.
The only exception to this might be in a situation were cell phone antennas are operated on top of a roof and people are allowed access to that roof top so you can get right up close to the antennas.
Some early studies of cell phone usage showed some adverse health effects, a slightly increased risk of brain tumors and cataracts among them. However, the largest and most recent study did not show any increased risk. http://www.eskimo.com/~nanook/radio/2007/04/undestanding-cell-phone-tower-health.html
This isn’t to discredit earlier studies however. The earliest cellular handsets operated at power levels up to four watts. Without any external input your brain normally produces about 12-25 watts of heat. An additional 4 watts is a significant heat load and it’s not heat that is distributed evenly but rather concentrated near the antenna. So it is extremely likely that there were significant health risks with these phones.
The next generation cut that power to 1 watt maximum. Still enough for mild thermal effects and possibly some marginally increased risks.
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