37. Indeed homelessness has reached suchproportions that local government can't possiblycope.

　　38. To help homeless people toward independence, the federal government must support jobtraining programs, raise the government wage, and fund more loe-cost housing.

　　39. Although the figure way vary, analysts do agreeon another matter: that the number of the homelessis increasing.

　　40. Even when homeless individuals manage to find a shelter that will give them three meals aday and a place to sleep at night, a good number still spend the bulk of the day wandering thestreet.

　　41. Many others, while not addicted or mentally ill,simply lack the everyday survival skills needed toturn their lives around.

　　42. Boston Globe reporter Chris Reidy notes that the situation will improve only when there arecomprehensive programs that address hemany needs of the homeless.

　　43. This means that our noses are limited toperceiving those smells which float through the air,missing the majority of smells which stick tosurfaces.

　　44. Our noses are capable of detecting human amells even when these are diluted to far belowone part in one million.

　　45. However, it has been found that even peopleinsensitive to a certain smell at first can suddenlybecome sensitive to it when exposed to it oftenenough.

　　46. The explanation for insensitivity to smell seems to be that the brain finds it inefficient tokeep all smell receptors working all the time but can create new receptors if necessary.

　　47. The brain finds it best to keep smell receptorsavailable for unfamiliar and emergency signals suchas the smell of smoke, which might indicate thedanger of fire.

　　48. Many theories concerning the causes of juvenile delinquency (crimes commited young people)focus either on the individual or on society as the major contributing influence.

　　49. Theories centering on the individual suggest thatchildren engage incriminal behavior because theywere not sufficiently penalized for previousmisdeeds or that they have learned criminalbehavior through interation with others.

　　50. Theories focusing on the role of society suggest that children commit crimes in response totheir failure to rise above their socioecomonic status, or as a rejection of middle-class value.

　　51. For Example, changes in the economy that lead tofewer job opportunities for youth and risingunemployment in general make gainful employmentincreasingly difficult to obtain.

　　52. More families consist of one-parent households or two working parents; consequently,children are likely to have less supervision at home than was common in the traditional familystructure.

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