What are OPEC and OPEC +, and why has the UAE quit?

The United Arab Emirates has announced its withdrawal from OPEC and the wider OPEC+ framework, marking a significant blow to one of the most influential organizations in the energy sector. The Gulf country, with a capacity of approximately 4.8 million barrels per day, decided to focus on its "national interests." This move comes amid a historic energy shock triggered by the US-Israel war on Iran.