But critics - including some utility executives, regulators and consumer groups - say the trend poses great hazards.

The trend towards hosted Web applications poses a significant challenge for the open source software community.

Recent trends in the geography of voting in Great Britain pose major problems for all political parties as they develop strategies for the next general election.

The trend poses a challenge to traditional agencies and has created unusual partnerships.

These trends pose a dilemma for the planners.

These trends posed challenges for Ravel, always a slow and deliberate composer, who desired to keep his music relevant but still revered the past.

In particular, the warming trend poses critical problems for coal producers and users, unless cost-effective pollution control techniques can be developed.

It also notes that present trends pose dangers for the future of Medicare and Social Security.

But the researchers and agency representatives who participated with me in a recent assessment agree that the trend poses serious challenges for the region.

Our summary statement pointed out how the cooling trend posed challenges to models of Antarctic climate and ecosystem change.