Geography: 2019: CBSE: [Delhi]: Set – III

Both growth and development refer to changes over a period of time. The difference is that growth is quantitative and may be positive or negative, while development is a qualitative change and is always positive.

Literacy is traditionally defined as the ability to read and write in any language and do the arithmetic calculation.

Age structure represents the number of people of different age groups.

The places where buying and selling of commodities and services take place are known as trading centres.

Two features of commercial ports are:

(i) They handle general cargo-packaged products and manufactured goods.

(ii) They also handle passenger traffic.

Urban waste disposal is a serious problem in India. In most of the cities and towns, about 30 to 50 per cent of the waste generated are left uncollected, which accumulate on streets and wastelands leading to serious health hazards.

Air pollution is a serious problem in India as it causes various diseases related to respiratory, nervous and circulatory systems. It can also cause acid rains.

Lagoons and backwaters are used for fishing and irrigating certain varieties of paddy crops, coconut, etc.

Male migration is higher than females from rural to urban areas due to economic reasons. In rural areas, traditionally it is the men who have the responsibility of earning money.

Female migration is higher than males from rural to rural areas in India due to marriage. After marriage, females are supposed to move to their husband’s house.