More environmental monitoring contributions later came out of EPFL’s SensorScope project [36], ETHZ’s PermaSense
project [37] on the collection of high-elevation permafrost data, and the GreenOrb testbed, where hundreds of motes
deployed in a forest have been used for various monitoring applications [38]. Reflecting the more recent trend of leveraging
RFID technology in sensor networks [39], in [40], badgers were equipped with RFID tags while active RFID readers were
installed on stationary motes.