Three African countries make the top 10.
By embracing a cleaner energy path not only will the country be able to catapult ahead of others, but it will also be able to create jobs.
Actuarial scientists could lead the world's economies down a catastrophic path if they ignore future resource constraints, driven by climate change.
If the world wants to survive the global crisis, it needs renewable energy and green-tech solutions, says Mark Swilling.
While the ANC's allies have criticised the government's decision to commit $2-billion to the IMF, the move has been welcomed by economists.
The Rio+20 conference is billed as a "once in a generation" opportunity for global sustainability but it's expected to end with a whimper, not a bang.
Consumer choice drives production and capitalism and colour-coding is changing demand patterns and the species caught, writes Sipho Kigs.
A spirit of determination has prevailed at the UN press briefing about the Rio+20 conference which will take place in Brazil later this year.
There are an estimated 130 000 non-governmental organisations (NGOs) operating in South Africa and more coming to the fore almost daily.
Big-name fashion brands are supporting women in Nairobi by employing them to produce their goods, and teaching them business skills in the process.
The Wild Coast belongs to future generations and should not be mined if its fragile ecosystem will be damaged, said Susan Shabangu.
Mesa has drawn on a community of scholars, researchers, teachers, students, government officials in higher education, private sector and civil society