The Paris agreement calls on countries to combat climate change and to accelerate and intensify the actions and investments needed for a sustainable low carbon future.
Ban said on Friday that the UN too learnt lessons from Sri Lanka's conflict.
UN Secretary-General Ban Ki-moon urged the Security Council on Monday to impose an arms embargo on South Sudan, sanction leaders and commanders who are blocking the implementation of a peace deal and fortify a UN peacekeeping mission.
Ban commended the India-US joint statement on climate change announcing their support for early entry into force of the Paris Agreement.
Ban Ki-Moon will step down from the post of UN Secretary General at the end of the year — 12 months before S Korea's presidential election in December 2017.
Buddha's teachings of compassion and non-violence can help the international community tackle pressing challenges, UN chief Ban Ki-moon said.
Iran has received UN Secretary General Ban Ki-moon's invitation to attend the Geneva II talks on the Syrian crisis, an Iranian foreign ministry official said on Monday.
UN Secretary General Ban Ki-moon on Monday held meetings with Iraqi leaders and urged them to deal with the root cause of the violence in Anbar province.