Techniques and systems are disclosed for monitoring multiple indoor and outdoor climate parameters and wirelessly transmitting the monitored data to a network for on-line analysis and dissemination. In one aspect, a monitoring device includes multiple sensors to monitor air quality modalities and generate corresponding monitored air quality data. The monitoring device includes a processor in communication with the multiple sensors to receive and process the monitored air quality data generated from the multiple sensors. Additionally, the monitoring device includes a display unit in communication with the processor to display the processed air quality data. The monitoring device includes a data communication unit to transmit the processed air quality data to a server. The server stores and optimizes the data through cross-calibration and makes the data available to persons who have purchased the monitoring devices and who wish to share the data in a social network.