Evaluate the effects of following pollutants on environment and human health: Non-biodegradable insecticides Pollen grain Chemical fertilizers containing phosphate and nitrate Wastes containing pathogens originated from health centres Chloroflorocarbon

Environmental pollution may be defined as any undesirable change in the physical, chemical or biological characteristics environment which can cause undesirable effects on various forms of life or property. Types of pollutants i.e. Biodegradable pollutants: That degrades or decomposes rapidly by natural processes. Non-biodegradable pollutants: Do not decompose or decompose very slowly in the environment. Effect of Non-biodegradable insecticides on environment and human health: Pesticides are chemical compositions employed to eliminate fungal or animal pests. They get to be suspended in the air and move when the wind blows, it potentially pollutes the air. When pesticides get into the water, they do so by drifting, running off, and leaching in the soil or through the direct application on top of the water, for example, to eliminate mosquitoes. Effect of pollen on environment and human health: Pollen grains are minute bodies in the form of fine to coarse dust that causes allergic reactions. Effect of Chemical fertilizers containing phosphate and nitrate on environment and human health: Fertilizers containing nitrogen and phosphorus are particularly noxious to animal and human health, causing eutrophication and mass death of fish and other aerobic organisms living in water. Effect of Wastes containing pathogens originated from health centres on environment and human health: Infectious waste may contain any of a great variety of pathogenic microorganisms. Pathogens in infectious waste may enter the human body by a number of routes. Effect of Chloroflorocarbon on environment and human health: Man-made compounds such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HCFCs) and halons destroy ozone in the upper atmosphere (stratosphere).

Relate the following phenomena with the trend of disturbance in Nitrogen Cycle resulting from different human activities: Global Warming Acidification of soil and water of river and lake

Human activities such as the use of fertilizer greatly increase the amount of nitrogen mainly including oxides of nitrogen (NO x ), ammonia (NH 3 ) and Nitrous oxide (N 2 O) from the aquatic and terrestrial ecosystem and NO x from fossil fuel and biomass combustion. Nitrous oxide (N 2 O) is 300 times more effective than CO 2 as a greenhouse gas. Thus, an increased amount of N 2 O and other oxides of nitrogen cause global warming. This led to the acidification of downstream freshwater systems like rivers and lakes.

Speculate the probable causes of each of the following phenomena: Insomnia, High blood pressure, partial or complete deafness Decrease in the concentration of dissolved oxygen in water and floating of dead fishes Dwindling populations of alligators were the result of hunting and loss of habitat, Inflammation in the respiratory tract of lung Decrease in the number of pollination insects

Air pollution refers to the release of pollutants into the air—pollutants which are detrimental to human health and the planet as a whole. According to the World Health Organization (WHO), each year air pollution is responsible for nearly seven million deaths around the globe. Causes of Insomnia, High blood pressure, partial or complete deafness: Air pollution is a cause of such diseases. Hypertension is an accelerating factor in the degeneration of the auditory system and hearing as people age. Low dissolved oxygen primarily results from excessive algae growth caused by high levels of nutrients such as phosphorus and nitrogen. This is known as water eutrophication (nutrient enrichment) resulting from anthropogenic activities such as agriculture, industry, and sewage disposal. Dwindling populations of alligators and crocodiles were the result of hunting and loss of habitat. Lung inflammation can come from exposures, infections, and diseases like asthma or bronchitis. When airborne toxins enter the lungs, irritation results. Common irritants include: Cigarette smoke, Pollutants, Chemicals, Fumes. The main problem affecting most pollinators is thought to be the loss of suitable habitat. Including forage and nesting or breeding sites.

Evaluate the effects of following pollutants on environment and human health: Non-biodegradable insecticides Pollen grain Chemical fertilizers containing phosphate and nitrate Wastes containing pathogens originated from health centres Chloroflorocarbon

Environmental pollution may be defined as any undesirable change in the physical, chemical or biological characteristics environment which can cause undesirable effects on various forms of life or property. Types of pollutants i.e. Biodegradable pollutants: That degrades or decomposes rapidly by natural processes. Non-biodegradable pollutants: Do not decompose or decompose very slowly in the environment. Effect of Non-biodegradable insecticides on environment and human health: Pesticides are chemical compositions employed to eliminate fungal or animal pests. They get to be suspended in the air and move when the wind blows, it potentially pollutes the air. When pesticides get into the water, they do so by drifting, running off, and leaching in the soil or through the direct application on top of the water, for example, to eliminate mosquitoes. Effect of pollen on environment and human health: Pollen grains are minute bodies in the form of fine to coarse dust that causes allergic reactions. Effect of Chemical fertilizers containing phosphate and nitrate on environment and human health: Fertilizers containing nitrogen and phosphorus are particularly noxious to animal and human health, causing eutrophication and mass death of fish and other aerobic organisms living in water. Effect of Wastes containing pathogens originated from health centres on environment and human health: Infectious waste may contain any of a great variety of pathogenic microorganisms. Pathogens in infectious waste may enter the human body by a number of routes. Effect of Chloroflorocarbon on environment and human health: Man-made compounds such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HCFCs) and halons destroy ozone in the upper atmosphere (stratosphere).

Mention the role of biodiversity in the following two aspects of the progress of human civilization: (i) Production of foods (ii) Manufacturing of medicines

(i) Biodiversity can be considered the basis or foundation for agriculture and food production, thus making way for the farming systems to evolve. The agricultural biodiversity pertains to plant genetic resources such as crops, wild plants that are harvested and managed, wild animals hunted for food and so on. The agricultural biodiversity provides food and raw materials for food. It also contributes to food security and nutrition. (ii) Biomedical research mainly depends on the natural supply of plant and animal materials and microbes to understand humans’ physiology and treat diseases. Numerous medicines, such as antibiotics and painkillers, are often resourced from plants and animal sources. It is seen that recent findings also allow for the development of medicine and the treatment of diseases.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 34

MEDIUM

10th West Bengal Board

IMPORTANT

Earn 100

Hilsa, Bee, Penguin, Rauwolfia -
Assess which are the causes of endangeredness of the above-mention organisms?

Important Questions on Environment : Its Resources and Their Conservation

MEDIUM

10th West Bengal Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 35

Discuss any two roles of People’s Biodiversity Register (PBR) in conserving local biodiversity?

EASY

10th West Bengal Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 36

Tabulate any of the four activities which are prohibited in a sanctuary following the provisions of Wildfire Act?

EASY

10th West Bengal Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 37

Evaluate the effects of following pollutants on environment and human health:

Non-biodegradable insecticides
Pollen grain
Chemical fertilizers containing phosphate and nitrate
Wastes containing pathogens originated from health centres
Chloroflorocarbon

EASY

10th West Bengal Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 38

'The ever-increasing population in the different cities of India is creating the crisis of ground water' Support the statement with reasons on the basis of your experiences. Construct a concept map to show how the increase in human habitat is influencing the ecosystem of Sunderbans.

EASY

10th West Bengal Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 39

Summarise which conservation measures have been adopted to increase the population of an endangered mammal exclusively found in the swampy grass lands under the foothills of the Eastern Himalaya. Discuss the role of biodiversity in maintaining the balance of the ecosystem of a river.

MEDIUM

10th West Bengal Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 18 - Environment : Its Resources and Their Conservation>West Bengal Board-2020>Q 40

Write the name of a National Park and a Biosphere Reserve of West Bengal.