61.   The shortage of cooking energy not only causes problems with nutrition, but also spreads disease.

62.   The strike has caused serious problems, but we hope bus services will quickly return to normal.

63.   The sudden influx of families needing work and housing caused some problems at first.

64.   These cause special problems for many partially sighted people who must be shown how to negotiate them.

65.   They can also cause big problems for coastal fisheries, aquaculture operations and the tourist industry.

66.   This can cause problems on the news desk and does not create a very good impression.

67.   This causes enormous problems, as the Q.

68.   This causes major problems in growth and development.