Question

18) List the six criteria pollutants that the clean air act regulates. For each pollutant use the earlier parts, describe both the cause or source of that pollutant and why it is of concern.

Answer 1

ANS- SIX CRITERIA POLLUTANTS THAT THE CLEAN AIR ACT REGULATE-

• Carbon monoxide--> It is an odorless and colorless grass. Source-that is generated from the combustion of fossil fuels, released from the vehicles such s trucks, cars, and also from the equipment used in construction.

Effect- When humans inhaled this toxic carbon monoxide gas it, mixed within the blood and reduces the capacity of the body to transport the oxygen for all organs of the body, and accumulation of this gas in large amounts results in the death of the individual.

• Particulate matter---> These are the small particles that float in environment.these are also called particulate matter, they are produced from the construction equipments and trains, etc.

Effect - .the size of these particles is directly proportional to its effact on health, particle size about 10 micrometers can pass through lungs and reached to heart and other organs and cause adverse effects on health.

• Nitrogen Dioxide--> It is a highly reactive gas that readily produced from the combustion.It is produced from the vehicles such as trucks, buses and industrially from power plants.It contributes in ground level ozone production.

Effect- It adversely affect the respiratory system, it reduces the immunity of lung infection, and becomes a cause of other problems such as bronchitis, coughing, cod.

• Lead---> It is a metal whose source is the environment and also produced in industries and mainly produced from vehicles such as cars and trucks causing air pollution.

Effect-It affects the health very badly and it directly acts on the brain, such that neurological effects in children and cardiovascular effectsin adults have been observed due to exposure of this metal for a long duration.

• Sulfur Dioxide--> It is gas having nasty and sharp smell, it is highly reactive gas. and It is produced from the burning of fossil fuels that contained sulfur,such as coal and oil burning. and large amount of sulfur dioxide emssion is occur.

Effect- It has wide variety of effect on humans as well as plants-It damages the crop and create acid rain, human health is also affected through it as it creates problems in the respiratory tract.

• Ground-level ozone---> When organic compounds chemically react with oxides of iron in the presence of sunlight the ground-level ozone is form.and the production is increased during summer and reduced during winter because in summer strong sunlight is obtained for the reaction to progress .produced from vehicles like car and trucks.

Effect- It promotes the irrition in respiratory system and also affects the heart causing pain in chest, coughing is also observed from the exposure to this for a long period of time.