Smart meters utilize a 912 MHz frequency and emit pulsed rf radiation 24/7, with full body exposures at up to 160x that of cell phones (Hirsch, 2011). This is an example of thousands of studies that show this is dangerous to the public health.In the present study we investigated the possible histopathological effects of pulse modulated Radiofrequency (RF) fields on the thyroid gland using light microscopy, electron microscopy and immunohistochemical methods. Two months old male Wistar rats were exposed to a 900 MHz pulse-modulated RF radiation at a specific absorption rate (SAR) of 1.35 Watt/kg for 20 min/day for three weeks. The RF signals were pulse modulated by rectangular pulses with a repetition frequency of 217 Hz and a duty cycle of 1:8 (pulse width 0.576 ms). To assess thyroid endocrine disruption....READ MORE AT: http://www.smartmeterdangers.org/index.php/smart-meter-research/112-pulse-modulated-900mhz