After the Paris climate agreement was ratified in 2015, policymakers were optimistic that it would help get climate change under control. But since then, confidence in the UN climate process has gone down. Emissions need to fall drastically to limit the worst effects of climate change, but they have only increased. And this year, the summit president is someone who also heads up UAE’s national oil company, increasing doubt that progress can be made in Dubai. The World’s Environment Correspondent Carolyn Beeler reports.