The COP28 climate summit will run from November 30 to December 9 in the United Arab Emirates. Key issues to be debated include whether to set a firm deadline to phase out the use of fossil fuels and how industrial polluting nations will provide climate financing to the Global South. David Schwartzman is professor emeritus at Howard University and a biogeochemist who is active with the Global Greens climate working group. He talks with Mark Dunlea for Hudson Mohawk Magazine.