Question

What are the two disadvantages of the destruction of forests?

Answer 1

The destruction of forests causes several harmful effects. Two major disadvantages are:
Loss of biodiversity: Many plants and animals lose their natural habitat, which leads to extinction of species.
Environmental imbalance: Destruction of forests increases carbon dioxide levels, reduces rainfall, and contributes to global warming and soil erosion.
Conclusion:
Deforestation harms both the environment and living organisms, leading to climate change and ecological imbalance.

Answer 2

The major sources of cooking energy include both traditional and modern fuels:
Traditional sources: Firewood, cow dung cakes, and charcoal.
Modern sources: Liquefied Petroleum Gas (LPG), electricity, kerosene, biogas, and solar cookers.
Conclusion:
Traditional sources are still widely used in rural areas, but modern sources like LPG and biogas are preferred as they are cleaner and more efficient.

Answer 3

Step 1: Understanding Green Revolution technology.
The Green Revolution involved the introduction of high-yielding variety (HYV) seeds, chemical fertilizers, pesticides, irrigation, and modern agricultural practices.
Step 2: Impact on soil.

Soil degradation: Excessive use of chemical fertilizers reduces natural fertility of soil.
Soil pollution: Continuous application of pesticides and chemicals contaminates the soil.
Loss of soil nutrients: Imbalance due to over-dependence on NPK fertilizers, leading to micronutrient deficiencies (like zinc and iron).
Soil salinity: Over-irrigation increases salinity and alkalinity, affecting crop productivity.
Conclusion:
Though Green Revolution increased food production, it also caused soil degradation, nutrient imbalance, and pollution due to overuse of chemicals.

Answer 4

Step 1: Organic enrichment methods.
- Use of organic manure, compost, and vermicompost to restore natural fertility.
- Addition of green manures and crop residues to improve soil organic matter.
Step 2: Chemical and biological methods.
- Balanced use of fertilizers including micronutrients.
- Biofertilizers (e.g., Rhizobium, Azotobacter) to fix nitrogen.
- Use of crop rotation and leguminous crops to naturally add nutrients.
Step 3: Other sustainable practices.
- Reduced use of harmful pesticides and chemicals.
- Proper irrigation management to avoid salinity and waterlogging.
Conclusion:
Soil can be enriched by using organic manures, biofertilizers, crop rotation, and sustainable agricultural practices that restore and maintain fertility.

Answer 5

Step 1: Understanding the question.
We are asked to find the word in the passage which has the same meaning as the word ‘effect’.
Step 2: Scanning the passage.
In the passage, it is mentioned: “{Destruction of forests has a major impact on the productivity of our crop lands.}”
Step 3: Identifying the synonym.
Here, the word ‘impact’ is used to show the result or effect caused by destruction of forests. The meaning of “impact” and “effect” is the same in this context.
Final Answer:
The word in the passage that means effect is impact.

Answer 6

Step 1: Understanding the question.
We need to find the antonym (opposite) of the word ‘minor’ from the passage.
Step 2: Scanning the passage.
The passage uses the expression: “{Destruction of forests has a major impact on the productivity of our crop lands.}”
Step 3: Identifying the antonym.
The word ‘minor’ means small or less important, whereas the opposite of this is ‘major’, which means large or important. In the passage, the word ‘major’ is used.
Final Answer:
The word in the passage opposite of minor is major.

Answer 7

Step 1: Understanding the phrase in context.
The passage mentions: “{The total bio-mass production goes up and so does the drain of the nutrients from the soil.}”
Step 2: Meaning of ‘bio-mass’.
Bio-mass refers to the total amount of organic matter produced by living organisms (plants, cowdung, crop wastes, firewood, etc.). In this context, it means the amount of plant and animal material that can be used as fuel or for energy.
Step 3: Application in passage.
In the passage, biomass is linked with crop wastes and cowdung being used as sources of energy. This also explains how nutrient drain affects soil productivity.
Final Answer:
In the passage, bio-mass means the total organic matter derived from plants (such as cowdung, crop wastes, and firewoothat can be used as energy.