Pollution of Ai...

Which of the following pollutants is NOT present in the vehicular exhaust emissions?

What is the main cause of pollution of water in India?

In which part of atmosphere is ozone layer present?

What is the main cause of sulphur dioxide emissions?

Which of these steps when adopted will contribute towards better waste management?

Which of the following, will NOT help in reducing air pollution?

Which of the following is due to global warming?

(i) An increase in the water level in the sea
(ii) The melting of snow on mountain peaks
(iii) A decrease in food production by plants

Which of these is the bio-indicator of air pollution?

What does the term 'conserving the 'environment' mean?

How can pollution from the burning of fossil fuels be reduced?

(i) By using an incinerator.
(ii) By using renewable sources of energy.
(iii) By fixing catalytic converters in vehicles.

What is caused, if carbon dioxide is released into the air?

How is sewage water purified for recycling?

What is the trapping of heat radiations by earth's atmosphere known as?

What are the effects of discharging excess heat from electrical power stations into rivers and lakes?

(i) The biological oxygen demand value of the water decreases
(ii) Instant death of certain organism
(iii) The population of algae increases
(iv) The concentration of dissolved oxygen increases

Which of the following is NOT an air pollutant?