The energy challenge that confronts Europe calls for an ambitious and courageous approach. Today s EU was built on concrete achievements, combining vision and the instruments needed to implement it.

This is the real challenge, and although it may prove ambitious, many countries will arrive at the Cancún conference with renewed hope for the future, thanks to the progress made since Copenhagen.

We have in the Secretary General's In larger freedom report an ambitious prospectus a challenge to our leaders to renew the United Nations by embracing an agenda for genuine change and achievement.

It seems very ambitious.

INFOCAP is comprehensive and ambitious.

The SDGs are extremely ambitious.

That's as ambitious as we are.

This Plenary Meeting has an ambitious agenda.

Well, particle physicists are nothing if not ambitious.

This is one of the more ambitious ones.

We would have liked a more ambitious result.

And we have ambitious hopes for its future.

I mean, think about that. How grand. How ambitious.

While confirming that eradicating poverty is the greatest global challenge facing the world today, the World Summit on Sustainable Development also acknowledged that oceans and coastal areas are critical for global food security and agreed on ambitious new targets for resources management and fisheries.

The team from Taiwan was a little bit more ambitious.

At this defining moment in history, we must be ambitious.

We cannot afford to fail, and we must remain ambitious.

In other areas, however, we clearly must be more ambitious.

We remain convinced that the MDGs, while ambitious, are achievable.

These are leaders who are highly ambitious for the greater good.

We are convinced that these are ambitious but absolutely legitimate goals.

Given those differing cultural perceptions, the reform proposals were extremely ambitious.

After all, we were ambitious and set the bar very high.

Indeed, all countries stood to gain from an ambitious Doha Round.

Development was broader and more ambitious than the Millennium Development Goals.

I'm someone ambitious someone who knows very well what he is after.

I'm someone ambitious someone who knows very well what she is after.

High performing systems also share clear and ambitious standards across the entire spectrum.

The selection of five major priority areas for development constituted an ambitious agenda.

Inadequate enforcement mechanisms and overly ambitious targets are among the reasons for failure.

Where we do need to be ambitious is in reforming the Secretariat's functioning.

This first challenge is what I refer to as the persuasion challenge.

The democratic challenge today is, above all, a social and human challenge.

The challenge

I regret that the Secretary General's ambitious vision has not yet been fully realized.

In contrast, when it comes to political reform, we should not be so ambitious.

We need to reframe the challenge that is facing Africa, from a challenge of despair, which is called poverty reduction, to a challenge of hope.

Global Cardboard Challenge.

The Renminbi Challenge

China s Growth Challenge

The Transparency Challenge

Europe s Immigration Challenge

Africa s Urban Challenge

The Biodiversity Challenge

The Chávez Challenge