The Guardian view on a non-proliferation treaty: fossil fuels are weapons of mass destruction | Editorial

The planet faces an existential threat if we do not transition from the current extractive model of growth to a low-carbon economy Colombia's economy is dependent on fossil fuels, which account for about half of its exports. But at the UN climate summit this weekend, Gustavo Petro, the country's president, committed to stop the expansion of coal, oil and gas exploitation and reorient his nation away from such "poisons". Colombia is the first big economy to endorse a fossil fuel non-proliferation...