1. A method for monitoring a sensor cloud using an RFID system having a plurality of read zones, comprising: obtaining the spatio-temporal state of a plurality of sensors within the sensor cloud using the RFID system, where: the spatio-temporal state of each sensor comprises sensor information, a time stamp, and a spatial location that is a representation of a single unique position in space in which the sensor is located, which is specified independently of the read zones of the RFID system; the RFID system is configured to determine the spatial location of a sensor independently of the read zones of the RFID system using information signals received from the sensor when the sensor is illuminated and without relying upon receipt by the sensor of a signal generated by a device that does not form part of the RFID system, where the spatial location is a single unique position in space in which the sensor is located; and the sensors are incapable of independently obtaining their own spatial location; storing the spatio-temporal state of the plurality of sensors within a spatio-temporal database, wherein the stored spatio-temporal state of at least one sensor comprises a first spatial location within a particular read zone with a first time stamp and a different, second spatial location within the particular read zone with a different, second time stamp; determining whether the spatio-temporal data satisfies at least one spatial condition based on the first and second spatial locations within the particular read zone; and triggering at least one event based upon determining that the spatio-temporal data satisfies the at least one condition.