Question

1. choose the correct answer.

__ like buses and trains helps conserve energy by __.
○ private transportation; adding pollution to the air
○ public transportation; using more fossil fuels
○ public transportation; reducing the number of cars using fossil fuels
○ private transportation; reducing the amount of pollution in the air

1. choose the correct answer.

carbon dioxide might cause the atmosphere to get warmer because ____.
○ carbon dioxide reflects sunlight
○ carbon dioxide traps heat
○ carbon dioxide traps sunlight
○ carbon dioxide changes to nitrogen

Explanation:

For Question 11:

Public transit like buses/trains reduces individual fossil-fuel cars, cutting energy use. Other options have incorrect logic: private transport increases pollution/fuel use, and wrong pairings of transport type and impact.

Carbon dioxide is a greenhouse gas. Its key property is trapping heat in the atmosphere, which leads to atmospheric warming. The other options describe incorrect mechanisms for CO₂'s effect on temperature.

Answer:

Public transportation; reducing the number of cars using fossil fuels

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For Question 12: