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

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.

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.

Opportunities emerging from information and communication technology-based development is unevenly distributed across the world. While developed countries have moved forward, the developing countries have lagged behind. This is known as the digital divide.

The two main problems of barter system are:
(i) There isn't a standard unit of account in which prices could be measured and quoted.
(ii) It is very difficult to search the seller of a product that one needs.

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.

Rainwater harvesting is very important because rapid climatic changes, an increase in global temperature and population growth is leading to water scarcity in different parts of the world.

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.