Indoor air averages 2-5 times more polluted than the outdoor air and air circulation is very less inside as compared to outside. Which of the following pollutants is not considered to cause indoor air pollution?

Which of the following statements is correct?
i. The less burning of fuels leads to a larger amount of greenhouse gases being emitted.
ii. Organic agriculture is not entirely emission-free, but the amount of pollutants is lower.
iii. Trees are not only natural air filters, but they also cool down summer temperatures by a few degrees.

Which of the following are the better household practices:

Smoking inside the house causes:

Air pollution has adverse effects on:

In which of the following household products formaldehyde is not found:

________ cars emit more nitrogen oxides than petrol cars

By which of the following ways we can reduce the exposure of synthetic chemicals in the house?

Using renewable energy sources is always better because:

Match column A(pollutants) with column B(sources).

Column A	Column B
(a) Ammonia	(i) Fossils fuels
(b) Black carbon	(ii) Fertilizers
(c) Formaldehyde	(iii) Cigarettes
(d) Smoke	(iv) Disinfectants

By installing tall chimneys in the factories:

The long form of C.N.G. is:

The natural air filters from the following is:

Various health deteriorating compounds present in the smoke are:

Which of the following measures need to be taken to control air pollution from vehicles?
(i) Installation of catalytic converters in vehicles
(ii) Use a hybrid or all-electric cars
(iii) Use internal combustion engines in vehicles
(iv) Use lead containing fuels

The most important cause of air pollution is:

The correction of is c)Burning fossils fuels.

• Air pollution is a mixture of harmful substances from man-made and natural sources. Motor vehicle emissions, fuel oil and natural gas used to heat homes, by-products of manufacturing and power generation, especially coal-fired power plants, and smoke from chemical manufacturing are the main sources of anthropogenic air pollution. 
• When fossil fuels burn, nitrogen oxides are released into the atmosphere, contributing to the formation of smog and acid rain. The most common nitrogen compounds released into the atmosphere by human activities are collectively called nitrogen oxides.