BBC: Climate scientists at leading universities are joining forces to discuss the basis of a set of principles governing investment in fossil fuels.
They include academics at Oxford, Imperial College London and Harvard.
Prof Myles Allen, of Oxford University, said the move was similar to principles governing investment in South Africa under apartheid in the 1980s.
"This is a challenging question being put to universities," he told BBC News.
"We have the opportunity here to think about the...