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Question
_______________ states that particulate size of 2.5 micrometres or less in diameter are extremely harmful for human health.
_______________ states that particulate size of 2.5 micrometres or less in diameter are extremely harmful for human health.
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Solution
The correct option is B Central Pollution Control Board
Air pollution is any undesirable change in physical, chemical or biological characteristics of air. The substances which pollute the air are called air pollutants and can be particulate (dust, soot, fly ash) or gaseous (carbon monoxide, sulphur dioxide, nitrogen dioxide).
Particulate pollutants can vary in their size and generally particles larger than 10 micrometres in diameter tend to settle down within a day of their release. But smaller particles remain suspended for a longer time and are more harmful.
CPCB advises the central government and the Governments of Union Territories to prevent and control water and air pollution.
According to the Central Pollution Control Board (CPCB) particulate matter, having a size of 2.5 micrometres or less is extremely harmful for human health. This is because these particles can easily pass through the respiratory tracts during inhalation of polluted air and can get lodged in the lungs causing irritation, inflammation, respiratory infections and breathing difficulties. Hence option b is correct.
The permissible emission levels for petrol and diesel vehicles which have been implemented in Europe are referred to as Euro norms. Bharat Stage Emission Standards are laid down by the Government of India, keeping the Euro norms as reference, in order to regulate the output of air pollutants from equipment that use combustion (uses fuel which combusts inside a combustion chamber with the help of an oxidizer (typically oxygen from the air) or spark (the combustion process of the air-fuel mixture is ignited by a spark) ignition engines.
Euro III norms were introduced in Europe in 2000 and Bharat Stage II Emission Standards were introduced in India in 2005.
Air pollution is any undesirable change in physical, chemical or biological characteristics of air. The substances which pollute the air are called air pollutants and can be particulate (dust, soot, fly ash) or gaseous (carbon monoxide, sulphur dioxide, nitrogen dioxide).
Particulate pollutants can vary in their size and generally particles larger than 10 micrometres in diameter tend to settle down within a day of their release. But smaller particles remain suspended for a longer time and are more harmful.
CPCB advises the central government and the Governments of Union Territories to prevent and control water and air pollution.
According to the Central Pollution Control Board (CPCB) particulate matter, having a size of 2.5 micrometres or less is extremely harmful for human health. This is because these particles can easily pass through the respiratory tracts during inhalation of polluted air and can get lodged in the lungs causing irritation, inflammation, respiratory infections and breathing difficulties. Hence option b is correct.
The permissible emission levels for petrol and diesel vehicles which have been implemented in Europe are referred to as Euro norms. Bharat Stage Emission Standards are laid down by the Government of India, keeping the Euro norms as reference, in order to regulate the output of air pollutants from equipment that use combustion (uses fuel which combusts inside a combustion chamber with the help of an oxidizer (typically oxygen from the air) or spark (the combustion process of the air-fuel mixture is ignited by a spark) ignition engines.
Euro III norms were introduced in Europe in 2000 and Bharat Stage II Emission Standards were introduced in India in 2005.
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