The problem of acid water draining from abandoned mine dumps and shafts has long seemed insurmountable, with some estimates putting the pollution on the Witwatersrand as high as 350 litres a day. New technology from Dow Sub-Saharan Africa is finally offering a solution.
Power ships are proving to be a quick-fix temporary solution to electricity constraints around the world. In Africa, they are used to good effect in Ghana. The floating power stations are either anchored off shore or moored at quayside and transmit power through cables or transmission lines.
It looks like something from a sci-fi film, with its massive tower and thousands of wall-like solar mirrors set in an arid and deserted landscape. But Khi Solar One, Africa's first concentrated solar power project, is a very real example of the future of renewable energy.
As the people flock to cities, infrastructure to accommodate the mushrooming urban populations is strained and environmental pressure grows apace. Cape Town has taken heed and is planning for a greener, more sustainable future. One measure is its increasing use of renewable energy sources.
There are many positive benefits to nuclear energy, not least of which is enough power to end load shedding and blackouts. But there is strong resistance to the idea of nuclear. "People need to understand that we are not a scary industry; we are in your everyday world," says the head of Necsa in the first of a two-parter interview.
Having your company aligned to your city could spark innovative ways of promoting business and tourism. "Choosing a domain name with some local flavour should work well for many companies," says Domains.co.za, which has dotJoburg, dotCapetown and dotDurban available.