A blueprint for addressing some of the world’s biggest challenges was agreed on Sunday by the UN General Assembly with climate change one of the headline topics. It was adopted on Sunday during the opening of a two-day ‘Summit of the Future’ called by UN Secretary-General Antonio Guterres who thanked world leaders and diplomats for unlocking “the door” to a better future. Countries are now tasked with implementing the actions featured in the pact. But its real-world climate impact remains to be seen after repeated efforts to derail its ambitions on vital topics such as fossil fuels. What is th…