From an environmental standpoint, atmospheric sulfur dioxide concentrations should not exceed a threshold limit of roughly ________________ ppm?
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Answer: A. 5
Explanation
Environmental health standards limit ambient sulfur dioxide concentrations to protect public health and ecosystems. Industrial threshold limits are established near 5 ppm to prevent respiratory distress from continuous exposure. Keeping sulfur dioxide levels low prevents acid rain formation and respiratory illness in human populations. Sulfur dioxide is a pungent, toxic gas emitted primarily by fossil fuel combustion and industrial smelting. Air quality standards regulate pollutant concentrations to maintain safe breathing conditions in urban areas. Chronic exposure to elevated sulfur dioxide damages lung tissues and aggravates existing respiratory conditions.
Environmental protection agencies monitor ambient sulfur dioxide levels continuously around industrial facilities. Flue gas desulfurization systems help power plants comply with stringent sulfur dioxide emission thresholds. Occupational safety regulations protect industrial workers from dangerous sulfur dioxide gas accumulations. Option B of 50 ppm exceeds safe environmental limits and poses significant health risks upon continuous exposure. Option C represents a dangerously high concentration that would cause severe respiratory damage quickly. Option D of 5000 ppm is a lethal concentration level causing rapid asphyxiation and immediate death.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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