The United States and China on Wednesday vowed to step up their cooperation in tackling climate change, including work toward reducing methane emissions and illegal deforestation, in a joint declaration issued during U.N. climate talks in Britain.The show of cooperation between the world's two largest carbon dioxide emitters came as they prepare for a virtual meeting between U.S. President Joe Biden and Chinese President Xi Jinping, with U.S. political news website Politico reporting that the event is tentatively scheduled for Monday evening.U.N. Secretary General Antonio Guterres welcomed …READ FULL ARTICLE