Barack Obama Quotes

Climate change is the greatest threat of our time.

It seems clear to me also that climate change is a problem which can no longer be left to our future generation.

Climate change is the greatest threat to our existence in our short history on this planet. Nobody's going to buy their way out of its effects.

Climate change is the biggest threat to our chances of winning the fight against hunger.

Climate change...is, simply, the greatest collective challenge we face as a human family.

I think climate change is probably the most extreme, and it's been going on for years because it's very difficult to talk about a planetary issue like climate change and to get people who live within four-year electoral cycles to actually pay attention to something that you predict is happening way in the future.

Climate change: Never before in history have human beings been called on to act collectively in defence of the Earth

Let's unite our impassioned voices to combat climate change. The time is now.

The truth is that climate change is presenting the greatest challenge humanity has ever faced.

The most profound security threat we face today is global warming....climate change has the capacity to change the way all of us live.

What do we do about climate change bearing down upon us?

We're all agreed that climate change is one of the greatest and most daunting challenges of our age. We have a moral imperative to act and act now.

Tackling climate change is a collective endeavour, it means collective accountability and it's not too late

Climate change is a huge problem, an almost insoluble problem.

We must stop climate change. And we can, if we use the tactics that worked in South Africa against the worst carbon emitters.

I like to think of climate action as a three-legged stool.

The climate change movement is a river overflowing seeping into every nook and cranny.

Global climate change is real and we have a limited time to change our behavior or live with the consequences. We can all help by making small changes in our lives to letting our voice be heard by our governing bodies. As has always been the case in this country, if the people demand change, it will come.

The only reason runaway global warming seems unstoppable is that we have not yet tried to stop it.

We must turn the greatest collective challenge facing humankind today – climate change – into the greatest opportunity for common progress towards a sustainable future.

When you warn people about the dangers of climate change, they call you a saint. When you explain what needs to be done to stop it, they call you a communist.

I would hate for climate change to be accepted simply because everyone was dying.

We face a climate crisis now that is the most serious challenge our civilization has ever confronted. And the greatest country in the world [America] has to remain a part of this unprecedented global agreement to deal with it.

The window of opportunity to avoid dangerous climate change is closing more quickly than previously thought.

Climate change: I say the debate is over. We know the science, we see the threat and we know that the time for action is now