EVS UNIT 1.pptx

Course- ENVIRONMENTAL STUDIES Course Code – 22447 Topic – 1 CO-a: Develop Public Awareness Environment about Environment. Unit Outcome- UO 1a,1b, and 1c MSBTE LEAD- STUDY AT YOUR DOORSTEP Written by  Wh...

Course- ENVIRONMENTAL STUDIES Course Code – 22447 Topic – 1 CO-a: Develop Public Awareness Environment about Environment. Unit Outcome- UO 1a,1b, and 1c MSBTE LEAD- STUDY AT YOUR DOORSTEP Written by  What we will learn today Understand about environment 1. Agenda point – and its segments. Environment , its need and Scope. Content 2. Agenda point – 1.1 Definitions. need of Segments of environmental studies. Environment 1.2 Segments of environment-Atmosphere, Hydrosphere Lithosphere, Biosphere. Page 3 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  Learning Objective/ Key learning  1a. Discuss the scope of environment.  1b. Describe various types of environment  1c. Describe the importance of environmental studies. Page 4 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  Concept Map of Environment Page 5 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  UNIT 1: ENVIRONMENT Environm ent  The word environment is derived from the French verb ‘enviro’ which means ‘surrounding’. Thus, our Biotic Abiotic environment can be defined as the Compone Components physical, chemical and biological nts Living Non- world that surround us.  In Simple way the Environment is A place Thing Living s Things around us includes people, children, benches, ground, grass, trees, insects, birds, e.g. People, e.g. Play ground, sunlight, air, land, water, mountain etc. Children, Trees, Benches, Swings,  Biotic components constantly interact and Grass, Plants, Slide, Air, Water, insects, Birds etc. Mountain etc. exchange things with each other as well as with abiotic components, for their survival and existence. Page 6 Maharashtra State Board of Technical Education Wednesday, August 28, 2024 Types of Environment Natural Man-made Social Psychologi Environm Environme Environme cal ent nt nt Environme The environment Social Every individual has his The nt changed or Environment own psychological environment includes an environment, in which he modified by the in its original individual’s lives. form without interference of human beings is social, The Psychological the economic and environment enables us to interference called man made political understand the of human environment. condition personality of an beings is e.g., wherein he individual. Both the known as Infrastructure, lives. person and his goal from natural Utilities, e.g., Customs, psychological environment. Institutions, Traditions, environment All living and housing, industries ethics, Language, nonliving , parks, buildings, Culture, things Page 7 energy networks, Professions, Maharashtra State Board of Technical Education Wednesday, August 28, 2024 STRUCTURE OF ENVIRONMENT : Physical Biological Environment Environment (i) Solid - The lithosphere (solid i) Plants (flora): trees, grass, shrubs etc. earth) : Soil / land and Mountain (ii) Animals (fauna) : domestic and wild Environment animals, humans, birds, insects etc. (ii) Liquid - The hydrosphere (water component) : River, Reservoir, Oceans and Glacier Environment (iii) Gas - Various gases (oxygen, carbondioxide, nitrogen, méthane etc. present in atmosphere. Page 8 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  SCOPE OF ENVIRONMENTAL STUDIES  This subject educates the students, citizens and experts to understand the complexity of environmental issues.  Experts having knowledge in the environmental fields that enables them to facilitate the solution of environmental problems.  The current trend of environmental degradation can be reversed if people of educated communities are organized and empowered.  By knowing this subject we can develop eco-friendly new technologies for various developments which can save the natural resources as well as reduces environmental pollutions and public health impacts.  As, the new earth is not discovered till now we have no other option except to maintain the ecological balance on the planet Earth so that the liveable environment should be kept for our future generations.  The major areas in which the role of environmental scientists are of vital importance are natural resources, ecosystems, biodiversity Page 9 Maharashtra State Board of Technical Education Wednesday, August and its conservation, environmental pollution, social issues, human 28, 2024  NEED AND IMPORTANCE OF ENVIRONMENTAL STUDIES: Public awareness. Environment issues being of international importance. Problems cropped in the wake of development. Conserve energy. For an alternative solution. Save species from extinction. Save the natural resources. Reduce the pollution. Wise planning of development. Sustainable development Page 10 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  SEGMENTS OF ENVIRONMENT The atmosphere is composed of nitrogen and oxygen. Besides, argon, carbon dioxide, and other trace gases. Biosphere: Biosphere indicates the realm of living Hydrosphere: The organisms and their Hydrosphere comprises all interactions with types of water resources environment, viz oceans, seas, lakes, rivers, atmosphere, hydrosphere streams, reservoir, polar and lithosphere. icecaps, glaciers, and ground water. Lithosphere: Lithosphere is the outer mantle of the solid earth. It consists of minerals occurring in the earth’s crusts and the soil e.g. minerals, organic matter, air and water. Page 11 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  SEGMENTS OF ENVIRONMENT Atmosphere: The atmosphere implies the protective blanket of gases, surrounding the earth: (a) It sustains life on the earth. (b) It saves it from the hostile environment of outer space. (c) It absorbs most of the cosmic rays from outer space and a major portion of the electromagnetic radiation from the sun. (d) It transmits only here ultraviolet, visible, near infrared radiation (300 to 2500 nm) and radio waves. (0.14 to 40 m) while filtering out tissue-damaging ultra violate waves below about 300 nm. Page 12 Maharashtra State Board of Technical Education Wednesday, August 28, 2024  SEGMENTS OF ENVIRONMENT Hydrosphere: The Hydrosphere comprises all types of water resources oceans, seas, lakes, rivers, streams, reservoir, polar icecaps, glaciers, and ground water. 71 % of earth area is covered by water. (i) Nature 97% of the earth’s water supply is in the oceans, (ii) About 2% of the water resources is locked in the polar icecaps and glaciers. (iii) Only about 1% is available as fresh surface water-rivers, lakes streams, and ground water fit to be used for human consumption and other uses. Lithosphere: Lithosphere is the outer mantle of the solid earth. It consists of minerals occurring in the earth’s crusts and the soil e.g. minerals, organic matter, air and water. Biosphere: Biosphere indicates the realm of living organisms and their interactions with environment, viz atmosphere, hydrosphere and lithosphere. Page 13 Maharashtra State Board of Technical Education Wednesday, August 28, 2024