Environmental I...

In Delhi whole public transport system runs on CNG because :
i. burns more efficiently than petrol/diesel
ii. is cheaper than petrol/diesel
iii. cannot be siphoned
iv. can be adulterated

CO₂ concentration is continuously increasing in atmosphere and due to increased CO2 levels:
i. efficiency of water use by plants will increase
ii. CO₂ fertilization effect will occur
iii. rate of transpiration will decrease

The dust collection efficiency of Electrostatic precipitator is affected by the particle size of the aerosol to be collected, so :

Particulate matter:
i. smaller than 2 micrometer are trapped in nasal hair and bronchial mucus.
ii. which reach the lung alveoli are not absorbed into the blood.

Read the following statements:
i. PAN & Ozone are secondary pollutants formed by reaction among primary pollutants.
ii. conversion of primary pollutants into secondary pollutants reduces toxicity due to the phenomenon of synergism.

For blue baby syndrome :

i. nitrate becomes a problem for human body when converted into nitrite.

ii. changes Fe⁺³ of Hb into Fe⁺² of MHb. iii. Clinical symptoms include cyanosis.

iv. People of any age can suffer from blue baby disease.

There are two types of catalytic converters :

a) 2-way catalytic converter treats only NOx and CO.

b) 2-way catalytic converter treats hydrocarbons, NOx and CO

Planting trees on both the sides of roads and highways is called providing green muffler. It is to reduce :

irreparable computers and other electronic goods are known as

Various methods applied for removing particulate pollutants from air employs: