Indoor CO2 concentrations exceeded the ASHRAE standard due to overcrowded classrooms and inadequate ventilation. Implementation of more breaks and recesses between classes might alleviate the high level of CO2. The occupancy of classrooms in Hong Kong often exceeded the maximum occupancy of the ASHRAE 62-1989 standard. Decreasing the number of students in each classroom can also lower the CO2 level. Increase the rate of ventilation could remove the accumulated CO2; for example, the use of ceiling fans, exhaust fans could increase the exchange of indoor air with the outdoor.
Australian marine biologist Lloyd Godson lived for two weeks inside the world’s first self-sufficient, self-sustaining underwater habitat BioSUB. He breathed air from microalgae that gave off oxygen through a gas-exchange Biocoil, watered with recycled urine.
WOOFAA will exhibit its Smart Algal Oxygen Bar, which can turn carbon dioxide into oxygen through algae photosynthesis and features a smart monitoring system to control purification efficiency.
Our observation of a reduced functional connectivity during CO2 breathing is consistent with previous reports that light sedation or anesthesia (Deshpande et al, 2010) decreases connectivity in DMN regions, and is also in line with the suggestions that CO2 has a mild sedative effect.
Our observation of a reduced functional connectivity during CO2 breathing is consistent with previous reports that light sedation (Greicius et al, 2008) or anesthesia (Deshpande et al, 2010) decreases connectivity in DMN regions, and is also in line with the suggestions that CO2 has a mild sedative effect (Fukuda et al, 2006).
Radon is found to be the second most common reason for lung cancer (after smoking). Since radon can easily be trapped inside buildings, indoor radon concentrations can increase to many times that of outdoor levels. When radon gas decays, it emits radioactive radiation in the form of an alpha particle/waves.
Main objective of this paper is to establish a comprehensive review of Indoor Air Quality (IAQ) guidelines and other standard values that are implemented currently.