Backers include Microsoft, BlackRock, General Motors, American Airlines, Boston Consulting Group, Bank of America and ArcelorMittal.

US-based researchers are looking into the possibility of producing hydrogen fuel from hydrogen sulphide, also known as sewer gas.

A team of researchers from the Hong Kong University of Science and Technology has developed a photo battery that has dual functions in harvesting solar energy and storing energy in a single device.

The backing of the federal environment minister is described by advocates as a betrayal.

It makes it one of only two big South African lenders to close the door on funding for such activities altogether.

Researchers at the Queensland University of Technology propose the idea of using feldspars found in mine tailings as part of a potential cheaper catalyst for hydrogen fuel production.