On the the 40th anniversary of Earth Day, this warming planet we live on is posing serious new challenges to human civilization: increasingly severe droughts, floods,and storms across the globe, and slowly rising ocean levels.

VOA: standard.2010.04.21

Talking about the U.S.role in Asia, Gates told the conference Washington's commitment to its allies was as strong as ever, but that greater multilateral cooperation was needed to deal with both old and new challenges to security.

VOA: standard.2009.05.30

Added to the mix of challenges facing the new U.S.and NATO commander are the dynamics of Afghanistan's August presidential election.

VOA: standard.2009.06.15

But a shift in emphasis to security issues offers a new set of challenges for the president.

VOA: standard.2010.01.06

The groups urged the winner to be magnanimous as he will face immense challenges as the new president "that should transcend partisan politics."

VOA: standard.2009.07.26

"Climate change challenges us all to find a new development paradigm that balances economic growth and long-term prosperity with social progress and ecological sustainability.

VOA: standard.2009.09.01

The WHO Chief says the new Swine Flu A-H1N1 virus shows how health challenges are changing.

VOA: standard.2009.05.18

And Republicans have their own challenges trying to find new leaders and craft a cohesive message beyond simply opposing the president and his policies.

VOA: standard.2010.01.06

She finds it exciting to make discoveries and find new ways to solve scientific challenges.

VOA: standard.2010.03.29

In addition to the pipeline, the new Czech government faces other E.U.challenges, including a crucial June summit that will deal with the so-called Lisbon Treaty.

VOA: standard.2009.05.11

He spoke about challenges facing Iraqi forces and American troops in their new mission.

VOA: standard.2010.08.02

But the critics and supporters agree one of the British national health service's biggest challenges, as it enters its seventh decade, are the mounting cost of new technology and medicines, and an aging population.

VOA: standard.2009.09.24

Dr.Sagir Ahmed of Aminu Kano Teaching Hospital in Kano was one of the organizers and speakers at a conference on the challenges of diagnosing cancer in Nigeria: is the WHO says that 70% of the new cancers that will be seen in the future are going to be affecting individuals in the developing nations -- the so-called poorer segments of the world.

VOA: standard.2010.06.16