Conversation so far:
What was the Orangi Pilot Project?
The Orangi poverty alleviation project (known as the Orangi Pilot Project, or OPP) was initiated by Khan as an NGO in 1980.
Why did he start it?
The project proved an impetus to the socio-economic development of the population of the area.
Are there any other interesting aspects about this article?
Orangi is located on the northwest periphery of Karachi.

Question: Why did Khan start the OPP?
Self-contained rewrite: Why did Akhtar Hameed Khan start the OPP?