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26 March 2018 Photo Pixabay
Back to the drawing board to save water
We’ve managed to damage nature’s ‘filter’ with air, ocean, and soil pollution, and by destroying wetlands.

Dr Cindé Greyling, a University of the Free State (UFS) DiMTEC (Disaster Management Training and Education Centre for Africa) alumni, studied drought mitigation with a strong focus on communicating important water-saving information. 

Can we run out of water?
Yes, and no, says Dr Greyling. “To our knowledge, water is not ‘leaking’ through our atmosphere. We have what we have, but that doesn’t mean we will have enough clean, fresh water forever. Nature has a magnificent way of purifying water through the water cycle. We, on the other hand, must use a lot of money and energy to purify water. Also, we’ve managed to damage nature’s ‘filter’ with air, ocean, and soil pollution, and by destroying wetlands. The other problem is a simple supply and demand scenario. More people will need more water, but not only that, population growth calls for industry development and increased food supplies – all of which require more water.”    

A war over water
Besides some Hollywood impressions, it is difficult to imagine a war over water, but it is possible. “Some experts are convinced that we are heading there, and others claim that such tensions already exist. Personally, I don’t favour these kinds of shock tactics (or truths) – social research has shown us that it rarely leads to behavioural changes. We can learn a lot from what was has been done in Cape Town. Although we all think people were bombarded with ‘Day-Zero’-scares, they were actually encouraged to adapt their behaviour with a communication campaign that hardly ever used the term ‘Day-Zero’. This approach mobilised citizens to reach record lows of water usage.” 

Adapt a new normal
Dr Greyling encourages the “new normal” set in motion by Capetonians. “Water consciousness is needed, even when the rain comes again. We’ve taken water for granted for too long. As consumers, we have the power to turn this situation around – drop for drop. Be aware about the amount of water you use, how you use it, and for what. Keep in mind that any wastage and pollution (of ‘dry’ things) also wastes and pollutes water. Generally, we need to behave better regarding consumption.”  

News Archive

Prof Dejene’s inaugural lecture to focus on light energy
2016-05-05

Description: Prof Dejene Tags: Prof Dejene

Prof Francis Dejene
Photo: Thabo Kessah

The Dean of the Faculty of Natural and Agricultural Sciences, Prof Danie Vermeulen, and the Assistant Dean, Dr Tom Ashafa, will be hosting the inaugural lecture of Prof Francis B Dejene on Friday 6 May 2016 at 17:00 in the New Science Building Auditorium on the Qwaqwa Campus.

Prof Dejene, a Professor of Physics in the areas of solar energy and phosphor, is a National Research Foundation C3-rated researcher with more than 100 articles in international peer-reviewed journals as well as more than 1 000 citations in author references. He has also made more than 100 national and international conference contributions. Prof Dejene has also acted as a reviewer of about 15 international and national professional journals and has supervised more than 25 MSc and PhD students.

The subject of the lecture will be ‘Light energy in service of mankind – from nanoscale to microscale’.

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