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Nitrogen Dioxide

Definition: Nitrogen dioxide is a toxic reddish-brown gas with a chemical formula NO₂. It is formed primarily as a result of combustion processes and industrial activities.

Usage Examples:

• Noun - Physical Science: Nitrogen dioxide is a common air pollutant that contributes to the formation of smog and acid rain.
• Noun - Chemistry: The laboratory technician used nitrogen dioxide as a reagent in the chemical reaction.
• Adjective: The local environmental agency recorded high levels of nitrogen dioxide in the city's air quality index.
• Verb: The factory emitted toxic fumes containing nitrogen dioxide into the atmosphere.

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