After last year’s Conference of the Parties to the United Nations Framework Convention on Climate Change (COP-28) event in the United Arab Emirates (UAE), this year’s COP-29 is being hosted by another petro-state, Azerbaijan, in its capital Baku. Azerbaijan is one of the oldest oil-producing countries in the world, with its oil and gas production accounting for nearly 47.8 per cent of its GDP and over 92.5 per cent of its export revenue in 2022. Postage stamps and sheets issued this year by the country provide a fascinating look at the evolution of the oil and gas industry in the country and its transition towards green energy.