Choose the incorrect statement:

Question

Accepted Answer

Option 2 is the correct answer because Dobson units do not measure noise in the environment. Instead, Dobson units are a measure of the concentration of ozone in the Earth's atmosphere. Specifically, they quantify the total amount of ozone in a column of air stretching from the Earth's surface to the edge of space. This measurement is crucial for understanding the thickness of the ozone layer, which protects life on Earth from harmful ultraviolet radiation.

Now, let's explain why the other options are incorrect:

1. **Option 1: Methane and $CO_{2}$ are greenhouse gases.**  
   This statement is correct. Methane (CH₄) and carbon dioxide (CO₂) are indeed greenhouse gases. They contribute to the greenhouse effect by trapping heat in the Earth's atmosphere, which leads to global warming and climate change.

3. **Option 3: Montreal Protocol is associated with ozone layer depletion.**  
   This statement is correct. The Montreal Protocol is an international treaty designed to phase out the production and consumption of substances that deplete the ozone layer, such as chlorofluorocarbons (CFCs). It is directly related to efforts to protect and restore the ozone layer.

4. **Option 4: Use of incinerators is crucial to disposal of hospital waste.**  
   This statement is correct. Incinerators are commonly used for the disposal of hospital waste because they can effectively destroy pathogens and reduce the volume of waste. This method is crucial for managing hazardous medical waste safely and preventing the spread of infections.

In summary, Option 2 is the only incorrect statement because it inaccurately describes the purpose of Dobson units, which are related to ozone measurement, not environmental noise.