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Introduction-to-environmental-science ppt
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- 2. Definition, Scope andImportance • Environmental Science analysis the issues that exists in the environment in holistic way. • A discipline that belongs to applied science. • A multidisciplinary study that involves biology, geology, chemistry, physics, engineering, sociology, health, anthropology, economics, statistics, computers and philosophy.
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- 4. • Everything thatsurrounds us. • Environment coined as “Mother Nature”. • Melting pot of the development of culture and tradition. SCOPE
- 5. Non-renewable Resources NATURAL RESOURCES •A resource that takes millions or thousands of years before it becomes the target resource. • Sequestered basically for energy generation. • Principal source of chemical energy (potential energy with subsequently turns to kinetic energy) • Fossil fuel is one of the most common example. ⚬ Natural gas, oil and coal. ￭ Oil and natural gas were created from organic remnants of the past. • Developed countries for example USA consumes 20% of energy resources due to demand.
- 6. Non-renewable Resources • Twopatterns of energy consumption: Primary energy consumption and Secondary Energy Consumption. • Primary Energy Consumption pertains to the immediate use of the fossil fuel (Transportation, heating, cooking, or energy generation). • Secondary Energy Consumption involves the use of electricity. ⚬ Major sectors that consumes energy: ￭ Industrial Sector ￭ Transportation Sector ￭ Residential Sector ￭ Commercial Sector
- 7. Renewable Resources • Theresources can be sequestered in all the time due to its endless supply • Solar energy, wind,hydropower, bioenergy and geothermal energy sources are the sources that are considered as renewable.
- 8. Forest Resources • Significantresource • Plants produced from forest area can be consumed as food for organisms or raw materials for product development. • varied in composition and biodiversity ⚬ Plays substantially in economic valuation. • 30% of the world is covered with forest • Global Composition of forest: ⚬ Africa- 33% ⚬ Latin America- 25% ⚬ North America- 11% ⚬ Asia and USSR- 14% ⚬ European Countries- 3% ⚬ Indian Forest Cover- 20.6%
- 9. Forest Resources Significance offorest • Commercial Values- Principal source of commercial product • Ecological Significance- Provides habitat, immobilize pollution, and produce constant oxygen supply to the Earth System • Aesthetic values- Superficial value of the forest • Life and economy of tribal- Provides sustenance for tribal people
- 10. Water Resource Water isone of the most important resource necessary for the survival of an organism. Types of Water Resources • Saltwater Resources- high salinity level • Groundwater Resources- most abundant freshwater on earth • Surface Water Resources- water on the surface of the Earth.
- 11. Water Resource Water isone of the most important resource necessary for the survival of an organism. Types of Water Resources • Saltwater Resources- high salinity level • Groundwater Resources- most abundant freshwater on earth • Surface Water Resources- water on the surface of the Earth.
- 12. Water Resource Uses ofFreshwater • Agricultural Use • Industrial Use • Domestic Use • Use for hydropower Generation • Use for Navigation and Recreation
- 13. Mineral Resources • Mineralresources are naturally occurring substance definite chemical composition and identifiable physical properties. • Ore, a mineral or combination of mineral from which a useful substance (usually metals) • This resource takes millions of years before it formed on the Earths surface.
- 14. Mineral Resources • IndustrialUse: Iron, aluminum, zinc, manganese, and copper. • Important Non-metal Resource: Iron, aluminum, zinc, manganese, and copper • Stone: Granite, marble, and limestone. • Ornaments: Gold, Silver, Palatium, and Diamonds
- 15. Food Resources • Foodis essential for growth and development of living organism ⚬ Main source of nutrients and trace elements from plants and animals • Cultivation of crops is the way that people feed their own kind. • Most of the crops were produced through land-based agriculture of crops and livestock • Sources of food: Food crops, livestock, aquaculture
- 16. Energy Resources • Energyis the capacity to do work • The principal source of energy here on Earth is the Sun that produces solar energy which drives all the processes on earth. • Types of energy: Chemical Energy, Electrical Energy, Hydel power, nuclear energy.
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