The $10 billion Green Climate Fund that U.S. President Donald Trump said was a waste of tax dollars has fallen behind on its goals, with a biggest payout so far of just $5 million for a U.S.-led solar energy project. Work at the international fund, which aims to help poor nations cut greenhouse gas emissions and adapt their economies to heatwaves, storms and rising seas has been slowed by legal red tape and the approval process, board members say. More than 40 nations in 2014 promised a total of $10.3 billion to the GCF, including Obama's $3 billion. Washington's $1...