Century Quote by Barack Obama

Look, very clearly there are things that need to be done urgently in relation to climate change, and of those the most obvious is…

— Peter Garrett

The most important issue of the 21st century will be the condition of the global environment.

— Ian McHarg

Most challenges arise suddenly, with little warning. Climate change is different. For decades, we've known why global average temperatures are rising, why greenhouse gas…

— Brian Deese

Climate change is one of the issues I worry most about because its impacts are enormous. But they're gradual, they're not immediate.

— Barack Obama

Climate change is the greatest threat to our common future. We have a very short period of time to tackle the problem before it…

— Chris Huhne

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

— Pope Francis

In the case of climate change, the threat is long-term and diffuse and requires broad international action for the benefit of people decades in…

— Martin Rees

I think the challenge of climate change in particular is the challenge for us to create and produce new norms for a new kind…

— Dale Jamieson

The two defining issues of this century are both universal but felt locally: the global water crisis and the resources boom.

— Jay Weatherill

Few challenges facing America and the world are more urgent than combating climate change. The science is beyond dispute and the facts are clear.

— Barack Obama

There's no happy ending where we prevent climate change any more. Now the question is, is it going to be a miserable century or…

— Bill McKibben

Global climate change is one of the greatest challenges facing humanity in the twenty-first century.

— Angela Merkel