Recently, PCRET has installed 1200 biogas plants throughout
Pakistan on cost-sharing basis, where 50% cost is to be borne by
the beneficiary [37]. Apart from these, three community size biogas
plants have been installed in rural areas of Islamabad, which
are meeting domestic fuel needs of 20 houses. A 1000 m3 biogas
plant is being designed for installation near Cattle Colony, Karachi
[37]. Biogas provides clean and smoke free energy unlike firewood.
Thus installation of biogas helps reducing indoor air pollution and
hence reduces the incidence respiratory diseases. Almost all households
reported that biogas has helped improving the health [38]. In
the light of above discussion, Sahir and Qureshi [10] suggested that
instead of focusing on the small scale family and community units,
the huge assessed potential of biomass should be utilized to develop
large-scale biogas plants operating on crop and animal wastes in
the rural areas and on street waste in the urban areas. Experience
from the success of such large-scale biogas pilot projects in Japan
can help the planners in this regard.