Speaking at a programme here in Islamabad, Khan said transboundary pollution was a global concern, adding that government would investigate it.
The minister for climate change said his office was gathering information on the matter and the ministry will raise the issue with the United Nations, if findings prove it.
It may be noted here that PML-N government has also planned to generate electricity from coal to overcome power crisis.
Over 950 people have died in Karachi due to deadly heatwave.
Morgues and gravediggers in Karachi have struggled to keep up with the flow of bodies since the scorching temperatures began last weekend.
While temperatures of 45 C and higher are not uncommon in parts of inland Pakistan, Karachi normally remains cooler thanks to its coastal location.