But for many of the world's poor, finding a good way to keep food cool is difficult.

VOA: special.2009.02.09

"I think Papua New Guinea is perhaps the most difficult country in the world to mount a national HIV response.

VOA: standard.2009.04.04

Fraud,insecurity and the weather all threaten to make next month's run-off elections difficult for one of the world's newest democracies.

VOA: standard.2009.10.21

South Africa's President Jacob Zuma Wednesday opened the World Economic Forum on Africa telling delegates that they were meeting in difficult times.

VOA: standard.2009.06.10

The Dutch have won all four of their World Cup matches so far, and Brazil coach Dunga describes them as a very difficult opponent.

VOA: standard.2010.07.01

And,these are occurring at a time when the global economic crisis is making it more difficult to maintain good health, especially in the developing world.

VOA: standard.2009.05.18