66. From the first two paragraphs, the author implies that ____.

1. hi-tech has made life easy everywhere
2. nobody seems to be innocent in polluting the planet
3. recycling can potentially control environmental deterioration
4. everybody is joining the global battle against pollution in one way or another

67. The waste caused by household and office electrical appliances on stand-by mode seems to ____.

1. be a long-standing indoor problem
2. cause nothing but trouble
3. get exaggerated
4. go unnoticed

68. By idle electronic devices, the author means those appliances ____.

1. left on stand-by mode
2. filling the atmosphere with carbon dioxide
3. used by those who are not energy-conscious
4. used by those whose words speak louder than actions

69. Ultra-light packaging ____.

1. is expected to reduce American waste by one-third
2. is an illustration of what is called "source reduction"
3. can make both manufacturers and consumers intelligent
4. is a villain of what the garbage experts call "source reduction"

70. The conclusion the author is trying to draw is that ____.

1. one person cannot win the battle against pollution
2. anybody can pick up tricks of environmental protection on the web
3. nobody can be absolutely right in all the tricks of environmental protection
4. anybody can present or learn a trick of cutting down what is not needed

(Reference keys.)