The water hyacinth mass-rearing project at Warrenvale Hoërskool in Warrenton, Northern Cape (2010) 

Philip Weyl working with the students at Warrenvale Hoërskool in 2010

 Warrenvale Hoërskool students learning the ropes around mass-rearing agents in 2010

The start of the rearing project at Ntsika Secondary School in Grahamstown in 2014

The sign at Ntsika Secondary School's rearing facility in 2014

Last Modified: Mon, 04 Jun 2018 09:43:10 SAST