In this episode of finweek Money Matters, we find out how BMW SA plans to generate a third of its electricity for the Rosslyn plant, using biogas. Edward Makwana, group manager of automotive communications at BMW, shares more. finweek Money Matters is a weekly programme aired every Friday 13:00 CAT on CNBC Africa (DSTV Channel 410). The programme focuses on trends, investment analysis and economic debates.