Some of the More Radical Proposals to Address and Mitigate

question 67

Essay

Some of the more radical proposals to address and mitigate climate change involve geoengineering, which involves deliberately modifying Earth's climate. Evaluate how the actions listed would affect the global climate and global biogeochemical cycles by answering the questions that follow.
Option 1: Plant more trees.
Option 2: Build one or more giant reflective mirrors and send them into Earth's orbit.
Option 3: Fertilize ocean water with iron.
Option 4: Spray sulfuric acid as aerosol into the stratosphere.
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Classify options 1-4 into two groups, based on the mechanisms by which they mitigate climate change. Which options would be most effective in changing atmospheric composition? Which options would be most effective in combating acid rain and ocean acidification?

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