Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.

The Taj Mahal is becoming discoloured and lustreless because

Yellowing of marble of the Taj Mahal is caused by:

Read the following environmental conditions of tropical rain forests. (i) Hot and humid climate (ii) Unequal lengths of day and night (iii) Abundant rain fall (iv) Abundant light and moisture Identify the conditions from the above list that are responsible for the presence of large number of plants and animals in tropical rain forests.

Among the air pollutants which gas is responsible for the damage caused to Taj Mahal .

Which of the following reactions is taking place resulting in discolouration of marble of the buildings like Taj Mahal?

Which of the following reactions is taking place resulting in discolouration of marble of the buildings like Taj Mahal?

Which pollutant of Mathura refinery is threat to Taj Mahal?

Taj Mahal is regarded as eighth wonder the world. Millions of people from India and from abroad visit this great historic monument every year. They appreciate the architecture and the carvings. It is indeed, very prestigeous for every Indian. But over the years, it has faced immense pollution problems. It has lost its Iustre due to the presence of traces of hydrogen sulphide and other pollutants present in air. (i)What is the main reason for the damage done to Taj Mahal and other historical monuments ? (ii) How is damage actually caused ? (iii) Suggest some ways to check the pollution ?