Whether she has launched an investigation into the widely reported concerns pertaining to (a) the increasing volume of acid mine drainage (details furnished) and (b) its impact on (i) the City of Johannesburg and (ii) the health of its residents; if not, (aa) why not and (bb) when will such investigation be launched; if so, in each case, what (aaa) are the findings of the investigation, (bbb) measures have been put in place to deal with these concerns and (ccc) are the further relevant details?