Q.6 Name and discuss the two major word food problems. (AKTU. - 2004-05, 06-07)
Related Questions -
Q. Discuss the major world food problems. how is undernourishment different from malnourishment?
Ans. Food is the basic material required for the survival. Good food is important for good health and growth. Crops, livestock, aquaculture, fruits, vegetables are the main sources of food modern scientific advancement have resulted in the increase in food production but due to population growth there might be food shortage.
The world food crisis or problems:
Undernourishment: - undernourishment is observed when the body does not consume enough food or calories to fulfill the need of the body, which causes the breakdown of its own stored fats and proteins. This leads to the reduction in metnal and physical growth.
People receiving less than 90% minimum dietary intake on a long term basis is considered as undernourished person has less resistance power.
It causes stunted growth, mental retardation etc.
Malnourishment:- malnourishment is the lack of certain nutrients such as carbohydrates, proteins, vitamins. It causes deficiency diseases.
E.g. Deficiency of nutrients Diseases
a. Iodine Goiter
b. Iron Anaemia
c. Vitamin A Night blindness
d. Vitamin B Beri-beri
e. Vitamin C Scuruy
Q.7 Discuss the environment effects of extracting and using mineral resources. (AKTU. - 2005 - 06, 2010 - 11)
Ans. Minerals are natural occurring crystalline solids. These resources are non-renewable type. Minerals can be metallic or non-metallic in nature.
These are extracted from the earth’s crust. And digging of the earth to extract minerals is called as mining.
Effect of extracting and using mineral resources are:
1. Emission of dust, suspended particles causes air solution.
2. Mining results in acid mine drainage which causes land damage.
3. Coal residue contributes to water pollution.
4. Fertility of the soil is lost.
5. Deforestation is followed.
6. Species are killed, due to toxicity of water, soil due to mine chemicals.
7. Ecosystem is disturbed.
8. Health and safety of coal miners is greatly at risk. Explosions, fires cause deaths and causalities.
9. Pneumoconiosis commonly known as black lung disease is a major hazard to under ground mining.
10. Mineral resources are non-renewable resources. Therefore, these are limited in natural deposits. So, these should be recycled and reused.
