Tilapia now SA’s own bio-indicator of water pollution Southern African water specialists can now use a local Tilapiine species – instead of alien fish species – to test whether water sources are polluted by compounds that can cause hormonal imbalances. Such chemicals can subtly mimic the female hormone oestrogen and alter the male hormone testosterone, […]
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There is always the possibility that you may find yourself unexpectedly in a survival situation one day. Water is usually the most important factor in determining whether you’ll come out alive. Solar Stills You need a digging tool, a container, a clear plastic sheet, a drinking tube, and a rock.