[#VIDEO] #UNSG Ban Ki-moon has made #climate action a priority for nearly a decade, and at the historic signing of the #ParisAgreement on #climatechange, leaders from all sectors joined us to thank him for his commitment. Thank you, @UnitedNations Secretary-General, for your commitment to bold, ambitious #climateaction! #UN #UnitedNations #TBT #ThrowbackThursday