If allowed to pass the Vaal River Barrage, the plant has access to a journey of about 1 000km of the middle and lower Vaal river, the Bloemhof Dam and then into the Orange river
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The nutrient enrichment problem can’t be solved unless appropriate levels of wastewater treatment are applied
Biological control is effective but the real solution would be to fix wastewater treatment plants in Joburg and Pretoria and stop sewage spills
Green Devil and Purple Monster gins are made by resident at the water’s edge using the otherwise-unwanted superweed
With La Niña bringing much-needed rain, it is inexcusable that South Africans do not have access to their most basic human need: water
Tiny bugs – water hyacinth planthoppers – have reduced the coverage of an invasive superweed to below 5%
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The coverage of the invasive superweed has been reduced to 12.5% from 40% in February
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About 300 000 planthoppers have been released on Hartbeespoort Dam to control the green horror
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Poorly treated wastewater in Tshwane is to blame for the water hyacinth and cyanobacteria colonies
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