The article said that a severe lack of office space was posing a challenge to the city's ability to retain companies and attract new businesses.

The report said a lack of adequate management at the 24-year-old reactor may pose a safety threat to workers and the public.

However the lack of any structure may initially pose problems for teachers who have not covered history before.

The lack of functioning wastewater treatment poses a threat to the environment and human health.

Finally, he argued, inequality and the resulting lack of mobility pose a serious threat to economic growth.

That, he said, is: does the lack of genetic diversity pose a problem?

The lack of postmarks also posed political problems for the Bush strategists.

But privacy advocates say the lack of legal clarity about who can gain access to location information poses a serious risk.

That lack of hard evidence, he says, "poses a serious problem for the theory."

For years, golf was scarce in the Caribbean, where strict development rules and lack of fresh water posed major challenges.