If we warm the world enough to melt Greenland, the global sea level would rise about 23 feet vertically. That would be:

Question

If we warm the world enough to melt Greenland, the global sea level would rise about 23 feet vertically. That would be:

BlackTom AI · Accepted Answer

A 23-foot (≈7.01 m) global sea-level rise would inundate large areas of low-lying coastline, producing massive displacement and infrastructure loss — so the correct assessment is the negative option.

1) Relevant knowledge points and concepts
- Global sea-level rise is measured as a vertical increase in mean sea level; 23 feet = 23 ft × 0.3048 m/ft = 7.0104 m.
- Coastal plain topography: many population centers (especially in Florida) sit only a few feet above current sea level.
- Impacts of such a rise include permanent inundation, increased storm surge, saltwater intrusion into aquifers, loss of ports, roads, and ecosystems, and large-scale human migration.

2) Step-by-step reasoning
- Convert 23 feet to meters to appreciate scale: 23 × 0.3048 = 7.0104 m.
- Many parts of Florida (including Miami, Tampa Bay areas, and much of the peninsula) lie well below or only slightly above this elevation; a 7 m rise would place much of these areas under water.
- Coastal California has some higher cliffs, but significant urban infrastructure and low-lying bays (e.g., parts of the Bay Area, Los Angeles/Long Beach harbors) would be severely affected.
- Loss of coastal real estate and infrastructure forces affected populations inland, creating large migration flows and economic dislocation.

3) Intermediate calculation (shown above)
- 23 ft → 7.0104 m (demonstrates the magnitude).

4) Why the correct answer is correct
- The option labeled “Bad…” accurately captures the harmful human consequences: people (including affluent coastal residents) would be forced to relocate inland, placing pressure on inland states like Pennsylvania and others. The statement succinctly reflects large-scale displacement and social disruption expected from such inundation.

5) Why the other option is incorrect
- The “Good…” option is both morally problematic and factually wrong: inundation destroys homes, critical infrastructure, ecosystems, and livelihoods across socioeconomic groups. Sea-level rise is a societal harm, not a desirable outcome.

Conclusion: Therefore the correct choice is: "Bad. All of those wealthy sun-tanned Floridians and Californians would be heading inland, to places such as Pennsylvania." This matches the provided answer.

If we warm the world enough to melt Greenland, the global sea level would rise about 23 feet vertically. That would be: 单项选择题

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