Former President John Mahama has said climate change is increasingly becoming dangerous and that the world must tackle it just like terrorism.

"We have a new global challenge, climate change, and it requires a sustained focus by all countries, just as we must tackle terrorism," President John Mahama said at the event.

Speaking on wide range of issues, the former Ghanaian leader urged African states to invest in Energy. He noted that energy is fast outstripping supply.

"As growth numbers increase in many African countries, the [demand] for energy is fast outstripping supply. It requires huge & strategic invests," he said.

Touching on trade, Mr Mahama hailed the free visa regime between Ghana and some other Africa countries. "I am happy we started with the implementation of a free visa regime for Africans in Ghana. There's nothing to fear. It improves trade."

He further urged African countries to deepen trade among member state.

"And we need to accelerate trade among ourselves in Africa & create opportunities for prosperity for our young people," he said.