Abstract: As we know, many air buildings are built and the ventilators are not work in timely manner and also less. Indoor air quality become an issue in recent years because it directly relates to human health. Therefore the clean air is essential especially when it comes to indoor air. To mitigate this worriment, the wireless sensor networks (WSNs) have the dormant. Wireless sensor networks are easy to afford and implement. Indoor carbon dioxide measuring is very necessary because at inside environment, its concentration is more than outside environment due to limited space. This paper aims to monitor the carbon dioxide gas through wireless sensors networks. Their causes and impacts on human health are also discussed. The paper represents the benefits of cognitive WSNs over conventional WSNs. It also shows the opportunistic routing protocol used for data routing is helps to transmit data at destination in timely manner and framework for data processing are used to transmit only useful information.
Keywords: Indoor air quality (IAQ), carbon dioxide, Cognitive wireless sensor networks (CWSNs), green house gas, CNOR.