The deal will give a much-needed boost to Iran's economy and lend important support to Rouhani's government.
Raging debates about the state of South Africa's energy industry have missed one critical area, the role of transport fuels and base chemicals.
The economic viability of extracting oil from the frozen north might be doubtful, but the geopolitical significance could be massive.
Europe was supposed to be big business for fracking companies, but so far not so good. So what's going wrong?