31.   Computer hackers pose a serious threat to the security of computer systems and some of the activities in which they engage are potentially criminal in nature.

32.   Given the preponderant influence of the US within the anti-Axis alliance, this hostility posed a very serious threat to de Gaulle.

33.   A doctor would have a defence of therapeutic privilege, if disclosure would have posed a serious threat of psychological detriment to the patient.

34.   Already Washington knew that it was only a matter of time before the USSR was in a position to present a serious nuclear threat to the United States itself.

35.   Renewed nationalist pressures within parts of greater Europe pose a serious threat of instability, which Community institutions must address.

36.   The Nature Conservancy Council has warned that leisure parks and industry are rapidly replacing agriculture as the most serious threat to UK Sites of Special Scientific Interest.

37.   Moreover, sunken waste containers could pose a serious threat over time as they begin to leak.

38.   Of these, logging poses by far the most serious threat.

39.   The report also warns that the Siberian forests, closed to the major logging companies until recently, are under serious threat from uncontrolled commercial exploitation.

40.   The Marine Conservation Society, which spent months on an underwater survey of the area says the slick is a serious threat to marine life.