1. Skip to content
  2. Skip to main menu
  3. Skip to more DW sites
Live TV
Latest audioLatest videos
In focus
Israel-Hamas warUkraineEurovision

German professor sniffs out a megacity sewage problem

February 17, 2011

Crowded megacities like Hanoi are just the places Peter Cornel intends to set up his sewage treatments plants.

https://p.dw.com/p/R1sr
Image: DW