21.   Another debatable question arises when one contemplates the whole biosphere,the conjoined life of the earth.

22.   Once, however, the child population began to rise, a new population question arose.

23.   Another practical question arises here.

24.   The question must arise, therefore, why this kind of urban sociology has become unfashionable.

25.   Evidently the question has arisen in discussions over what should happen next at the European Laboratory for Particle Physics.

26.   The question arises again with surrogacy.

27.   Now that scientists have access to human embryos, the question of genetic engineering arises.

28.   The question then arises as to the site and anture of the neutrophil chemoattractant.

29.   When a complementary therapy is shown to work, further questions arise.

30.   The question then arises, whose problem is all this?