1.   But as in all aspects of forecasting the greenhouse world, the task of prediction is clouded by uncertainty.

2.   But this outlook is clouded by uncertainty about the direction of the economy and by fourth-quarter results for the industry.

3.   Many uncertainties cloud the immediate future, including the final outcome of the American presidential election and the political survival of the current Israeli government.

4.   The shifts are indicative of the rapid-fire series of changes that can take place when economic uncertainty clouds the advertising outlook.

5.   Three uncertainties cloud the outlook for the world economy at the turn of the year.

6.   Uncertainty clouds the team picture even as hope still pervades it.

7.   But the succession was clouded by uncertainty.

8.   But the journey back is clouded by uncertainty which the iminent deployment of Russian peacekeeping troops has done little to alleviate.