Recent pipeline explosions have brought the problem of Mexico's black market for oil into tragic relief.
Venezuela's Petro cryptocurrency is a clever way to raise money by getting around international sanctions against the country.
Angola's president-elect, João Lourenço, has a reputation for relative probity. But, he's unlikely to rock the boat as Eduardo dos Santos remains party chairman.
When the price collapsed, the world's most disastrously oil-dependent state was the biggest casualty.
An America that drills more, and imports less, could mean Opec no longer gets to call the shots.
The SEC and others are pressing Exxon to disclose more climate change risks to investors. But new research suggests shareholders are already pricing in those costs on their own.
New technologies that can help us to meet climate change targets are struggling to see the light of day. Incentives need to be fixed, and carbon pricing is at the heart of the matter.
Scotland's numbers look far worse than the UK's.
It is important to nurture local companies and increase domestic participation in Africa's emerging oil economies.
South Sudan is not the only oil-dependent country suffering from the fall in oil prices. Nigeria and Angola are also having difficulties. One solution is for them to diversify their economies.
Woodside's deferral of its floating gas project in Western Australia is just the latest blow low oil prices have dealt the industry.
Angola's Dos Santos is buying time. His promise to step down is an attempt to diffuse growing political tensions, as repression continues. He might relinquish his position, but not his power.
Woodside's decision to shelve its $40 billion Browse project off Western Australia's north is not a disaster, but it does highlight some areas where the gas industry needs to get much smarter.
But will the rigs stop pumping?
What will be the economic and political fallout as oil continues its slide toward $20 a barrel?
While oil prices have halved over the past year, the number of mergers and acquisitions has most definitely not.
As the oil price crisis deepens, Angolans are beginning to ask what actually happened to the glut of oil dollars. Very little has come from the oil boom of 2004-14.
Oil price developments over the past 40 years have been truly spectacular, but the recent fall in oil prices is likely to last, thanks to increasing production.
It's been done before but tapping the Strategic Petroleum Reserve – particularly when prices for oil are low – isn't the best way to fund the Highway Trust Fund.
Big oil companies are moving to exploit new resources such as the Arctic or the Great Australian Bight. But are they worth the risk?