66. Biotechnology ____.

1. can help save energy and integrate industry and agriculture
2. can rid human of diseases and solve food problems
3. can treat pollution and protect environment
4. all of the above

67. Wastewater can be treated ____.

1. in genetic engineering
2. by means of biotechnology
3. in agriculture as well as industry
4. without the need for breaking down pollutants

68. When he says approaches and strategies that cut across political lines, the author means that they ____.

1. involve economic issues
2. observe ecological criteria
3. are politically significant
4. overcome political barriers

69. It can be inferred from the passage that the complexity of sustainable development ____.

1. makes it necessary to improve the assessing standards
2. renders environmental discussion possible
3. charges new technologies with risks
4. requires simplification

70. The success of sustainable development lies in ____.

1. its concept to be
2. good social teamwork
3. appropriate environmental policies
4. the representatives of all sectors of society

(Reference keys.)