Explanation

Primary pollutants are directly emitted from sources like vehicles and industries (e.g., NO₂, CO, SO₃).

SO₄ (Sulfate) is a secondary pollutant, formed through chemical reactions in the atmosphere.

Explanation

The three types of pollution are:

• Air Pollution: Harmful substances released into the air, like carbon monoxide and sulfur dioxide.
• Water Pollution: Contamination of water sources with pollutants such as industrial waste and sewage.
• Land Pollution: Degradation of land through activities like deforestation and improper waste disposal.

Explanation

Peshawar is at a lower altitude than Murree, and atmospheric pressure decreases with increasing altitude.

Higher altitudes (like Murree) have thinner air and lower pressure, making Peshawar's atmospheric pressure greater.

Explanation

Carbon dioxide, methane, and chlorofluorocarbons (CFS) are all significant air pollutants.

They contribute to global warming, ozone depletion, and air quality deterioration.

Explanation

Nitrogen makes up about 78% of Earth's atmosphere,

It is the most abundant gas.

It is essential for plant growth as.

It is a key component of proteins and DNA.

Nitrogen is the chemical element with the symbol N and atomic number 7.

It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

Explanation

Nitrogen (N₂) makes up 78% of Earth's atmosphere and is not a pollutant.

NO₂ and SO₂ are major air pollutants from vehicles and industries.

Explanation

Explanation

Explanation

Explanation

An anemometer is an instrument that measures wind speed.

This type of anemometer has a spinning wheel.

Additional Information:

A hygrometer is an instrument used to measure humidity

A salinometer is used to measure the salinity

A bolometer is used to measure the power of incident electromagnetic radiation

A barometer is used to measure air pressure in certain environment.