Watch: Secret footage shows COP29's chief Elnur Soltanov discussing gas and oil deals
Oil and gas accounts for about half of Azerbaijan's total economy and more than 90% of its exports, according to US figures.
this is the second year in a row the BBC has revealed alleged wrongdoing by the host government.
These events are supposed to be about reducing the world's use of fossil fuels – the main driver of climate change – not selling more.
You join cop29 to address climate change, I join cop29 to get access to oil markets we are not the same.