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.

Burning of fossils fuels like petrol, and diesel causes:

The correct option is a)Global warming.

• Fossil fuels are formed by the decomposition of buried carbon-based organisms that died millions of years ago.
• They create carbon-rich deposits that are decomposed and burned for energy. They are non-renewable and currently provide about 80% of the world's energy.
• They are also used in the production of plastics, steel and various products. Fossil fuels include his three types: coal, oil and gas.
• When fossil fuels burn, large amounts of carbon dioxide, a greenhouse gas, are released into the atmosphere. Greenhouse gases trap heat in the atmosphere, causing global warming.
• The average global temperature has already increased by 1°C. Temperatures above 1.5°C increase the risk of sea level rise, extreme weather conditions, biodiversity loss, species extinction, food insecurity, and worsening health and poverty for millions of people worldwide. .

Which of the following is the most significant effect of particulate matter in the air on human health?

When a mixture of rain and snow falls on the ground, it is called

Which of the following statements is correct?
(i) Dust particles are the solid, minute solid particles present in the air.
(ii) Krypton is also radioactive in nature.
(iii) The seeping of water into the ground is known as infiltration.

Identify the processes which are not involved in the water cycle from the following:
(i) 
(ii) 
(iii) 
(iv) 

What causes the decrease in the amount of carbon dioxide and increase in the amount of oxygen in the atmosphere?

The phenomenon of circulation of water from the Earth’s surface to the atmosphere and from the atmosphere back to the Earth’s surface is called

Which of the following forms of water vapor is not formed at low temperatures when water vapors condense?

Which of the following is not the main component of air?

For which of the following purposes is carbon dioxide used?

Approximately how much percentage of carbon dioxide gas is present in the air?