Troubled waters: what’s causing the mystery foam in a Jakarta canal?

Foaming waste spills from the Marunda sluice gate in Jakarta, Indonesia. Photograph: Aslam Iqbal/Sopa Images/Rex/Shutterstock

Foaming waste spills from the Marunda sluice gate in Jakarta, Indonesia. Photograph: Aslam Iqbal/Sopa Images/Rex/Shutterstock

source https://www.theguardian.com/world/2021/jun/09/jakarata-river-foam-cause-indonesia-marunda