Our environment
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The document discusses our environment and environmental pollution. It defines the environment as consisting of living organisms, physical surroundings like soil, atmosphere and water bodies. It then discusses ecosystems and food webs. It defines pollution as the introduction of contaminants that harm the environment. It provides details on water pollution from various sources like industrial and agricultural waste. It also lists the natural and man-made causes of air pollution like vehicle emissions, industrialization and burning of fossil fuels. Finally, it discusses depletion of the ozone layer due to CFCs and the dangers this poses by allowing more UV rays to reach the Earth's surface.
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This document discusses various types of water pollution. It defines water pollution as any physical, chemical, or biological change to water quality that harms living things. Water pollution can be from point sources like factories that directly discharge pollutants, or nonpoint sources like urban runoff. Major pollutants include sewage, nutrients, synthetic organic chemicals, and heavy metals. The document also covers causes of pollution like industrial and agricultural activities, sources of groundwater pollution, and solutions to prevent surface water pollution.
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The document discusses different types of environmental pollution including water, air, land, and noise pollution. It provides details on the causes, sources and effects of each type of pollution. Some key points include that water pollution can be from municipal, industrial, and agricultural waste and affects fresh water sources. Air pollution is caused by emissions from fossil fuels, vehicles and industry and contributes to issues like global warming. Land pollution stems from construction, farming, and dumping of industrial and domestic waste. Noise pollution mainly comes from transportation and construction equipment and can impact human and animal health.
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- 2. OUR ENVIRONMENT MADE BY – Arun Pillai X-D MADE BY – MANAS AND ARUN X-D
- 3. OUR ENVIRONMENT CONSISTS OF LIVING ORGANISMS PHYSICAL SURROUNDINGS SOIL(LAND) MICROORGANISMS ATMOSPHERE WATER BODIES PLANTS AND ANIMALS DECOMPOSERS
- 5. ECOSYSTEM
- 9. FOOD WEB
- 11. POLLUTION Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms.
- 12. Water Pollution – Contamination of water by addition of undesirable organic, inorganic or biological substances to water sources – Natural sources: soil erosion, leaching of minerals from of rocks and decay matter. – Industrial effluents – Destroys ecosystem and effects human health
- 13. Sources of water pollution • Community waste waters • Industrial wastes • Agricultural sources • Under ground water pollution
- 14. Causes of air pollution 1.Natural sources Volcanic eruptions Forest fires Pollen grains of flowers 2.Man-made sources Increase in pollution Deforestation Burning of fossil fuels and fires Emission from vehicles Rapid industrialization Wars
- 16. OZONE LAYER
- 17. HOW IS OZONE LAYER GRTTING DEPLETED? • The decrease in the ozone layer is closely linked to the synthetic chemicals called CFCs (Chlorofluorocarbons ) which are used in sprays, refrigerants and fire extinguishers. The depletion of the ozone will allow the UV rays to reach earth’s surface causing destruction to life.
- 18. DEPLETION OF THE OZONE