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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