I haven't read the article, but most of you have missed a point here. A cell phone tower (base station) does not only transmit on the cellular frequencies, but also on microwave via the microwave dishes for the backhaul. The dishes are directional and such there should be little stray RF energy going elsewhere except to the other dish far far away, but it is still possible there is some stray energy that is radiated to nearby area.
If the study is about microwave, then this is the microwave energy that I will be thinking of. No cellphones today utilize microwave frequency range (1.9GHz is close but not microwave yet).
Your home microwave oven operates in the 2.3GHz spectrum (close to the WiFi / ISM 2.4GHz one), as a comparison.
What RF energy is dangerous or not, depends on many factors, the intensity of the energy, and possibly the frequency but so far science is far from a consensus. Yes, I have been following this bit since the 80's myself.