Example sentences of "[noun] has become a [adj] problem " in BNC.

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1 In a survey of small businesses , Nat West said that late payment of trade debts has become a major problem over the past year .
2 The poll is not analysed , but it is striking that countries where pollution from cars has become a major problem have the highest percentages of people who believe that the state of the environment requires urgent action : 85 per cent in Italy ( at the top of the list ) , where Milan , one of the world 's smoggiest cities , now has car-free days and the capital Rome also suffers severely from vehicle congestion and pollution ; 84 per cent in Greece , where restrictions on cars in Athens are imposed to save the citizens ' lungs and their ancient monuments ; 80 per cent in the most vehicle emission-conscious country in Europe , West Germany , whose dead trees have become the symbol of pollution .
3 Finding a roof over your head has become a real problem for many more thousands of young people seeking a home of their own .
4 Since the balance of payments has become a structural problem because of the prolonged period of under-investment , imports have grown as a share of UK domestic spending , making the growth of inflation resulting from devaluation more rapid .
5 In recent hot summers , red spider mite has become a severe problem in some gardens .
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