Which consequence arises when atmospheric pollution degrades pietra dura mosaics?

💡 Explanation

Efflorescence obscures original colors because deposition creates surface salt layers, altering light reflection and color perception, driven by capillary action. Therefore, original color fidelity diminishes, rather than purely adhesive failure or broad substrate erosion affecting the design's stability.

• Which outcome arises in medieval astrolabes lacking precise pinhole alignment?
• Which risk accelerated Roman fortified walls' collapse in coastal areas during the empire's decline?
• Which structural problem developed when ziggurat builders layered sun-dried bricks without proper drainage?
• Which outcome reduced chinampa productivity when the Valley of Mexico experienced prolonged drought during Aztec times?
• Which technique did medieval Islamic mathematicians employ when solving algebraic equations geometrically?
• Which purpose did the alignment of ancient Egyptian temples like Karnak serve relative winter solstice sunrise?