Christian in France expressed a different concern, saying: The big problem of the transgenic seeds is that they are the monopoly of big companies.

VOA: special.2010.05.18

Critics say one big problem is corruption.

VOA: special.2009.02.21

A big problem,however,is the cost.

VOA: special.2010.06.02

A big problem,however,is cost.

VOA: special.2010.06.29

"So it's still a big problem in the society. In my book,they are afraid of the father losing his green card.

VOA: standard.2010.07.22

"Illegal logging is such a big problem simply because of the size of it.

VOA: standard.2010.07.28

But he says Ireland is not the last obstacle. He says another big problem is that the president of Czech Republic Vaclav Klaus has also not signed.

VOA: standard.2009.10.02

The researchers say showers may not be big a problem for healthy people.

VOA: special.2009.10.13

But President Barack Obama says a big part of the problem is soaring costs for health care.

VOA: standard.2009.06.13

Today,the number is still 40 percent. Part of the problem is that a number of big importers, such as China and Japan, are not doing enough to stop the import and sale of illegal timber.

VOA: standard.2010.07.28