Definition

Noun: * Acid rain: Rain (or any other form of precipitation, such as snow or fog) that is unusually acidic. This acidity is caused by the chemical reaction of water in the atmosphere with certain industrial gas emissions, primarily sulfur dioxide (SO₂) and nitrogen oxides (NOₓ), which form acids.

Usage

• "Acid rain" is an uncountable noun. It refers to the environmental phenomenon as a whole.
• It is commonly used in discussions about environmental science, pollution, and the impact of industrial activities on ecosystems.

Examples

• Noun:
  • The scientist studied the effects of acid rain on the forest's soil.
  • International agreements aim to reduce emissions that cause acid rain.
  • The statue's marble surface has been eroded by decades of exposure to acid rain.

Advanced Usage

• "Acid rain deposition": A more technical term that encompasses not only wet deposition (rain, snow, fog) but also dry deposition of acidic particles and gases.
  • The report analyzed patterns of acid rain deposition across the continent.

Variants and Related Words

• Acidic precipitation: A more formal or scientific synonym for "acid rain."
• Acidification (n): The process of becoming acidic. While related, this is a broader term that can apply to soil or oceans, not specifically to rain.
  • The acidification of the lake was linked to long-term acid rain.

Synonyms

• Acidic precipitation
• Acid deposition (broader term)

Related Phrases

• Cause acid rain: To be the source of the emissions that lead to its formation.
  • Burning fossil fuels can cause acid rain.
• Impact/Effect of acid rain: The consequences or results of acid rain.
  • The impact of acid rain on aquatic life is severe.

Noun

1. rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water