Walking is safe. And,it is said be to as valuable for one's health as more intense forms of exercise like jogging.

VOA: special.2010.06.08

Also,a valuable record of thousands of years of weather history will also be lost if the ice melts.

VOA: special.2009.04.22

But it was the Spanish explorer Hernando Cortes who understood that chocolate could be a valuable investment.

VOA: special.2010.02.17

He says knowing how to do this may be especially valuable if fossil fuel should become unavailable.

VOA: special.2009.04.14

And alfalfa can be a valuable food source for animals.

VOA: special.2010.02.09

Nothing valuable can be lost by taking time.

VOA: special.2009.07.30

But those in favor and those opposed seem to agree on one thing: the matter must be settled quickly so it doesn't hang over the AU agenda, taking up valuable time at summits for years to come.

VOA: standard.2009.07.02