Two very different groups gather this week, with the UN’s climate summit pushing for further carbon emissions cuts at a meeting in the UAE, a nation that is also represented at the OPEC+ conference of hydrocarbon producers. Here’s a guide to what’s coming up.

The big gathering. COP28 begins on Thursday and on the agenda this year is steak. The UN will publish a road map for global food systems, which generate about a third of global greenhouse gas emissions. The prime culprit is livestock, so what would it take to persuade us to eat less meat?