Former UN Secretary-General Ban Ki-moon has said, Donald Trump should stand on the right side of history by reconsidering the decision to pull his country out of the Paris climate change accord. <br/><br/><br/>Talking to press, Ban said, the US president's decision has larger political consequences beyond the impact on global greenhouse gas emissions. He said the choice leaves a leadership vacuum in international diplomacy.<br/><br/>For almost a decade, Ban spearheaded negotiations that led to the pledge of keeping global temperatures from raising another degree Celsius by 2100. Nearly 200 countries signed the agreement in December 2015.<br/><br/>Ban today joined more than 50 former world leaders in a statement criticizing Trump administration's decision. <br/>