With global warming threats, extreme weather conditions and environmental
pollution, conserving the environment and natural resources have been identified
and prioritized as the most significant activity globally. Oladokun et al. (2010) show
that regardless of the type, size and uses of the buildings, building construction often
have a significant negative impact on the natural environment. Mendler et al. (2006)
state that the built environment is not the largest industrial sector in economic terms,
but it is the largest in terms of resource flow. In fact, buildings are the largest users
of energy.