The term 'acid rain' was given by

Options

A. Fourier
B. Angus
C. Tyndall
D. Linnaeus.

Answer

To solve the question "The term 'acid rain' was given by," we can follow these steps:

### Step 1: Understand the concept of acid rain
- Acid rain refers to any form of precipitation (rain, snow, fog) that has a lower pH than normal, making it more acidic. It is primarily caused by pollutants in the atmosphere, such as sulfur dioxide (SO2) and nitrogen oxides (NOx).

### Step 2: Identify the key components related to acid rain
- Acid rain is formed when sulfur dioxide and nitrogen oxides react with water vapor in the atmosphere, resulting in the formation of sulfuric acid (H2SO4) and nitric acid (HNO3), among others.

### Step 3: Review the options provided
- The options given are Fourier, Angus, Tingle, and Linnaeus. We need to identify which of these scientists is associated with the term 'acid rain'.

### Step 4: Recall historical context
- The term 'acid rain' was first coined by a scientist in the 19th century. The relevant scientist in this context is Robert Angus Smith, who studied the effects of industrial pollution on rain.

### Step 5: Conclude the answer
- Based on the information gathered, the correct answer to the question is that the term 'acid rain' was given by **Angus**.

### Final Answer:
The term 'acid rain' was given by **Robert Angus Smith**.

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