This site is maintained by Henry Welman, former provincial manager (2017-2022) and subject adviser (2001-2016) for physical and technical sciences in the Free State, South Africa. Currently retired, but interested in the well-being of teachers and learners involved in these subjects. Please read the disclaimer at the bottom of the posts.
Wednesday, 17 December 2014
Are cell phones and power lines harmful to us?
It seems as if cellphones and power lines do not harm us. Read more here ...