How can the Kathmandu air pollution issue be solved?

MadagascarNow mentions the building of two more international airports. If and when that should happen, it's a scientific fact that it will only mean more air pollution emissions from planes - not less.

Hans, You may be right in that it will bring more tourists, but my thought was that it will take care of some of the congestion in Kathmandu. If it's international flights many tourists will avoid Kathmandu.

Let's hope and pray that the proposed construction of those two airports goes faster than the long awaited Melamchi Water Project. That project dates from 2001, and 17 years later, the Kathmanduites are still waiting. Project's completion had been promised "by Dashain"?

Re air pollution. While recognizing that vehicular emissions are the primary source of particulate pollution in Kathmandu Valley, the Ktm Post runs this headline in their Christmas day issue: "No remedy even as Kathmandu air crosses dangerous levels" i.e. breaking Hazardous & Very Unhealthy levels.