Exxon's climate research decades back painted an accurate picture of global warming, according to a new scientific paper. Still, the oil company continued climate-denying policy efforts.

Major energy companies have reported a surge in profits in the first three months of the year as oil prices have rallied.

Companies ranging from General Motors to UPS are exiting or reducing their operations in Russia as wide-ranging sanctions make it all but impossible to operate in the country.

Guyana, one of South America's poorest countries, is under severe threat by rising seas. That had made it a champion of climate action, but it all changed when ExxonMobil found oil off its waters.

A set of events shook the oil world this week: A tiny shareholder won a battle with Exxon, investors put pressure on Chevron and a Dutch court ordered Shell to slash emissions.

A brand-new hedge fund wants ExxonMobil to take climate change more seriously. And despite Exxon's intense opposition, it managed to fill at least two seats on the oil giant's board of directors.

Exxon, which usually avoids writing down assets, has announced its largest-ever impairment after canceling plans for natural gas projects in the Americas.