Question

Green muffler is used against which of the following types of pollution?
A. Air
B. Water
C. Soil
D. Noise

Answer 1

The growing of green plants along the roadsides to reduce noise pollution is known as a green muffler. Near the noisy places, a large number of green plants are grown so that they can absorb the noise and prevent the sound that reaches the citizens. Even the sharp lights of the vehicles are blocked by the trees during nights.

Complete answer:
Option A - air.
The mixture of solid particles and gases in the air is known as air pollution. For example, car emissions, chemicals from the factories, dust, pollen and mould spores may be suspended as particles in the air. A major part of air pollution which is emitted in cities is Ozone which is a gas. When air pollution is formed by ozone, it is also known as smog. Some of the air pollutants are very poisonous in nature.

Option B - water
The contamination of water bodies mostly as a result of human activities is known as water pollution. Lakes, rivers, oceans, aquifers and groundwater all are examples of water bodies. Water pollution is caused due to the introduction of contaminants into the natural environment.

Option C - Soil
The presence of xenobiotics chemicals or other alteration in the natural soil environment causes soil contamination or soil pollution as part of land degradation. Typically, it is caused by industrial activities, agricultural chemicals or improper waste disposal.

Option D - Noise
Noise pollution is also termed as environmental noise or sound pollution which is the propagation of noise which has a ranging impact on the activity of human or animal life and most of them harmful to a high degree. The sources of outdoor noise pollution worldwide are by machines, transport, and propagation systems.

Hence, The correct answer is option (D).

Note: Green Muffler is a technique which is used for reducing the noise pollution by planting 4-6 rows around the most populated areas or the noisy places like along the roadsides, industrial areas, societies which are located near the highways, etc. It is due to the fact that the dense trees reduce noise pollution because they filter out the noise and obstruct it from reaching the citizens.