B. Data Collection
Data was collected through the administration of
structured questionnaires which were distributed randomly
within Lagos and Ogun States. In Lagos State, the
questionnaires were distributed in Ikeja, Illupeju and Oshodi
while in Ogun State, the questionnaires were distributed in
Ota and Ewekoro. The choice of locations was informed by
the relatively high population distribution in the respective
locations, as well as the presence of industries which are
likely to release gaseous and particulate emissions into the
environment. Industrialized areas tend to serve as havens for
job seekers. Thus, such areas have high population densities
with many living in sub-human conditions [12]. A total of
2,000 questionnaires were distributed to the same number of
households. However, only 1,616 completed questionnaires
were retrieved, thus giving a return rate of 81%. Questions
addressed in the questionnaires included type of building,
smoking habits of residents, use and location of electricity
generating sets, location of kitchen, cooking methods and use
of alternative lighting system in the event of power failure. In
the course of distributing the questionnaires, oral interviews
were also conducted while visual observations of the state of
ventilation in the households were also made