you are watching bbc news. these are the headlines. the cop26 climate sub it has opened in glasgow as the un published a scientific report saying the planet is entering uncharted territory because of greenhouse gases in the atmosphere. earlier, leaders of the world s richest nations in rome fell short of meeting specific targets for reducing carbon emissions to net zero. the british prime minister borisjohnson warned that the pledges made for heads of state at the event were inadequate. australia has allowed the resumption of international air travel without the need for quarantine. it is the first time in more than 18 months. airports in sydney and melbourne are allowing fully vaccinated passengers to fly again after some of the world s strictest border controls were ended.