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प्रश्न
What was directly responsible for the rapid rise of world population in the twentieth century?
विकल्प
Better education and jobs
Religious and social customs
Better healthcare
Increased food production
उत्तर
Better healthcare
Explanation:
Improved healthcare facilities reduce mortality rates and boost population growth.
संबंधित प्रश्न
Present human population growth is following arithmetic progression.
Explain briefly the idea contained in the following statement. There will be increasing dependence on sources of energy other than coal and petroleum in the future.
Name any two renewable resources for the mankind.
Coal and iron are inexhaustible resources.
Which of the following is an exhaustible source of energy?
Match the terms given in column A with those in column B.
| Column A | Column B | ||
| (a) | Forest | (i) | Arithmetic progression |
| (b) | Food | (ii) | Geometric progression |
| (c) | Population | (iii) | Deforestation |
| (d) | Coal | (iv) | Afforestation |
| (e) | Flash floods | (v) | Renewable source of energy |
| (vi) | Non-renewable source of energy |
Given below is a set of paired terms. The first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Cutting down of forests : Deforestation :: Planting more trees : ______.
Define the following term:
Resources
Distinguish between the following pair:
Conventional and Non-conventional sources of energy.
Distinguish between the following pair:
Deforestation and Afforestation.
