Environment And Health

Environmental pollution has a significant and harmful effect on human health and well-being. Here are the key impacts:

Air Pollution: Exposure to polluted air, containing harmful particles and chemicals, can cause respiratory diseases like asthma, bronchitis, and even lung cancer. It also contributes to heart disease and reduced life expectancy.
Water Pollution: Contaminated water sources can lead to waterborne diseases such as cholera, dysentery, and hepatitis. Polluted water also affects the availability of clean drinking water, leading to dehydration and malnutrition.
Soil Pollution: Chemicals and waste products that contaminate the soil can enter the food chain through crops and affect human health. Prolonged exposure to polluted soil can lead to serious health issues such as poisoning and skin disorders.
Noise Pollution: Excessive noise can cause hearing loss, high blood pressure, stress, and sleep disturbances. It can also contribute to anxiety and other mental health problems.
Climate Change: Pollution contributes to global warming and climate change, leading to extreme weather events, which can have devastating effects on human populations through flooding, droughts, and displacement.

Conclusion: Environmental pollution is a major threat to human health, contributing to various diseases and reducing quality of life. It is essential to take steps to reduce pollution to safeguard the future of humanity.

Step 1: Understanding sound intensity.
The intensity of sound is measured in decibels (dB), which is a unit that quantifies sound pressure level. It is commonly used to measure the loudness of sounds.
Step 2: Analyzing the options.
- (A) Calorie: Calorie is a unit of energy, not used to measure sound intensity.
- (B) Watt: Watt is a unit of power, but not for measuring sound intensity.
- (C) Decibel: This is correct. The decibel is the correct unit for measuring the intensity of sound.
- (D) Gram: Gram is a unit of mass, not related to sound intensity.
Step 3: Conclusion.
The correct answer is (C) decibel, as it is the standard unit for measuring the intensity of sound.
Final Answer: The correct answer is (C) decibel.

Step 1: Importance of environmental protection.
Protecting the environment is crucial for ensuring a sustainable and healthy future for all living organisms. Various measures can be taken to protect the environment.
Step 2: Analyzing the options.
- (A) Tree plantation should be done: This is true. Planting trees helps absorb carbon dioxide, provide oxygen, and improve the quality of air.
- (B) Rivers should be cleaned: This is also correct. Cleaning rivers prevents water pollution and supports aquatic life, which is crucial for ecosystem health.
- (C) Alternative sources of energy should be used: This is also true. Using renewable energy sources like solar, wind, and hydroelectric energy helps reduce carbon emissions and reliance on fossil fuels.
- (D) All of these: This is the correct option because all the measures mentioned contribute to environmental protection.
Step 3: Conclusion.
The correct answer is (D) all of these, as each action helps in protecting the environment.
Final Answer: The correct answer is (D) all of these.