Name the two gases given out by burning of fossil fuels, which dissolves in rain to form acid rain.

Hint— Air pollution, Green house effect, Environment consequences: Acid rain, global warming etc. Steps: Use of smokeless appliances, Refined technology, Judicious use of energy etc.

There are following disadvantages of fossil fuels like coal and petroleum:  Burning of coal or petroleum causes air pollution.  Acidic oxides like oxides of carbon, nitrogen and sulphur are released...

The fossil fuels like coal and petroleum contain small amounts of nitrogen and sulphur. When fossil fuels are burnt, it produces oxides of nitrogen and sulphur. These gases cause inhalation...

(a) Fossil fuels are coal, petroleum and natural gas.  (b) Process of separation of different constituents from petroleum is called refining.  (c) Least polluting fuel for vehicles is CNG.

(a) ► False  (b) ► False  (c) ► True  (d) ► True  (e) ► False

Fossil fuels require millions of years to form from the dead vegetation and animals that get buried deep inside the Earth. They require high temperature and pressure for their formation,...

Fossils provide evidence in favour of evolution or establish evolutionary relationships by providing missing links.  Two ways to determine the age of fossils  1. Relative method – Fossils found closer to the surface are...

(i) Use of smokeless appliances (ii) Afforestation

The greenhouse gases produced are CO2, and oxides of nitrogen and sulphur. These cause global warming.

Fossil fuels have the following, environmental effects: (i) Air pollution: Burning of fossil fuels releases oxides and sulphides in the air and many other harmful gases like carbon monoxide, sulphur dioxide,...