27,28,29

Ozone can be easily converted to oxygen gas.

Some particles in the earth’s atmosphere reflect sunlight back into space.

The earth has many active volcanos.

Sulfur dioxide is poisonous.

Scientist 1 introduces an idea and Scientist 2 evaluates the idea.

Scientist 1 explains a concept that Scientist 2 supports with evidence.

Scientist 1 discusses a natural phenomenon, while Scientist 2 discusses geoengineering.

Scientist 1 introduces a solution, and Scientist 2 introduces a different solution

a particular volcanic eruption.

specific parts of the earth.

sunlight.

sulfur dioxide.