Conversation so far:
What was the Orangi Pilot Project by Akhtar Hameed Khan?
The Orangi poverty alleviation project was initiated by Khan as an NGO in 1980.
Why did Akhtar Hameed Khan start the Orangi Pilot Project?
The project initially focused on creating a system of underground sewers, using local materials and labour, and succeeded in laying hundreds of kilometres of drainage pipes along with auxiliary facilities.
Are there any other interesting aspects about this Akhtar Hameed Khan and Orangi Pilot Project article besidesdrainage pipes with auxiliary facilities?
By 1993, OPP had managed to provide low-cost sewers to more than 72,000 houses.

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