National income introduction​

In common parlance, national income means the total value of goods and services produced annually in a country. ADVERTISEMENTS: In other words, the total amount of income accruing to a country from economic activities in a year's time is known as national income.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)