Action Quote by Ban Ki-moon

We need an international solution to the challenge of climate change, there's no question about it. But the real key is, can you actually…

— Gina McCarthy

We face a climate crisis now that is the most serious challenge our civilization has ever confronted. And the greatest country in the world…

— Al Gore

The climate challenge illustrates how we have to change. The developing countries need more support and opportunities to develop and use clean energy. Because…

— Gro Harlem Brundtland

Global climate change has a profound impact on the survival and development of mankind. It is a major challenge facing all countries.

— Hu Jintao

Climate change is something that we cannot fix alone - it is the original collective action problem - it will not work unless almost…

— Abhijit Banerjee

The world must come together to confront climate change. There is little scientific dispute that if we do nothing, we will face more drought,…

— Barack Obama

Climate change is, over the longer term, our greatest national security challenge. We have to do all we can to slow it down and…

— Wesley K. Wark

The world can't have a global solution to climate change with U.S. action alone; and the world can't have a global solution without U.S.…

— Michael Franti

No country can solve climate change alone, we have to take global measures.

— Jose Mujica

I do not underestimate the difficulty of the challenge that global climate change presents to us. It will take a significant effort and the…

— Federico Pena

Climate change demands a collective response. We can't expect other countries to act if we don't.

— Caroline Lucas

Our overriding environmental challenge tonight is the worldwide problem of climate change, global warming, the gathering crisis that requires worldwide action.

— William J. Clinton