LONDON, Oct 9 (Reuters) – Britain's King Charles and heir Prince William made a rare joint appearance on Thursday to show support for the upcoming COP30 climate summit, at a time when a U.S.-led retrenchment has raised questions about how much the event can achieve. Political leaders from across the world, climate campaigners and big business will gather in Brazil in four weeks' time for the United Nations talks which aim to secure more ambitious action – and finance – to tackle rising global temperatures. But these will take place amid increased pushback by some world leaders that threatens to fragment the global consensus on climate, driven by factors like resistance to the cost of subsidising green energy projects and a prioritisation of defence spending. Last month, U.S. President Dona

See Full Page