76. To begin with, the author is trying to remind us of ____.

1. the likelihood of climate change making life inconvenient
2. the warning against worsening climate change
3. the inevitable consequence of global warming
4. the misconception of a warmer world

77. As the thought experiment shows, those at risk from global warming will ____.

1. live with the temperature raised by an average of 4°C
2. have nowhere to go but live in the desert
3. become victims as soon as 2050
4. move closer to the poles

78. It is clear from the passage that a practical approach to global warming is ____.

1. to reduce massively CO₂ emissions
2. to take protective measures by 2050
3. to prepare a blueprint for mass migrations
4. to launch habitual constructions closer to the poles

79. Earth's Plan B is ambitious enough ____.

1. to stop climate scientists making a bad situation even worse
2. to remove the sources of CO₂ emissions altogether
3. to regulate geo-engineering projects for efficiency
4. to manage the Earth's thermostat

80. Which of the following statements are the supporters of "Earth's plan B" for?

1. It's time to go green.
2. Energy-efficient measures must be taken.
3. Mass migration to the poles is inevitable.
4. For the planet it's geo-engineer or catastrophe.

(Reference keys.)