In another example embodiment, a system for managing a usage of energy has a network operable for communicating data signals. A first sensor is disposed in a first environment, the first environment having an associated first characteristic, the first sensor operable for sensing the first characteristic, and for communicating data signals relating thereto over the network. A second sensor is disposed in at least a second environment, the at least second environment having an associated second characteristic, which is independent in relation to the first characteristic, the second sensor operable for sensing the second characteristic, and for communicating data signals relating thereto over the network. At least one mobile device is operable in the first and the at least second environments, and for communicating data signals over the network in relation to the sensed first characteristic, and the sensed second characteristic, the mobile device includes: an energy-using component and a processor operable for controlling an operation of the energy-using component by: monitoring at least one environmental characteristic of at least two environments in which the mobile device is operable; tracking a location of the mobile device in relation to the at least two environments; informing the mobile device, based on the tracking, with data relating to the at least one environmental characteristic of the environment in which the mobile device is located; sensing a characteristic of the mobile device; comparing the data, related to the at least one environmental characteristic of the environment in which the mobile device is located, to the sensed characteristic of the mobile device; determining an action related to at least one energy-using operation of the mobile device based on the comparing of the environmental characteristic data to the sensed mobile device characteristic; and controlling the at least one energy-using operation of the mobile device based on the determined action.