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Similar to Pollution its types and reasons. Environmental chemistry
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Pollution its types and reasons. Environmental chemistry
- 1. Pollution
- 2. Environmental pollution • Any undesirable change in physical, chemical and biological characteristics of our air, land and water. • The addition of the agent to the environment, at a rate greater than which it can be rendered harmless by the environment. • Alteration of the Earth and atmosphere to such an extent that normal environmental processes are adversely affected.
- 3. Sources 1. Natural ( volcanic eruptions, oil spills) 2. Anthropogenic (Manmade) Fossil Fuel combustion Domestic, Agricultural and Industrial Waste Deliberate and accidental
- 9. Some Pollutants in the Atmosphere Combine to Form Other Pollutants • Primary pollutants • Emitted directly into the air • Secondary pollutants • From reactions of primary pollutants • Air quality improving in developed countries • Less-developed countries face big problems • Indoor pollution: big threat to the poor
- 19. Pollution and poverty • Pollution is strongly linked to poverty. Nearly 92% of pollution-related deaths occur in low- and middle- income countries. • Children face the highest risks and are the most vulnerable victims of pollution because small exposures to chemicals in utero and early childhood can result in lifelong disease, disability, premature death, as well as reduced learning and earning potential.
- 20. • Bioaccumulation: is the build up of non- biodegradable or slowly biodegradable chemicals in the body. • Bio magnification: Is the process whereby the concentration of a chemical increases at each trophic level.
- 21. Pollution Management Strategies Altering Human Activity: Hybrid cars, Alternate energy, awareness, education. Regulating and reducing quantities of pollutants released at the point of emission. Developing technologies for extracting pollutants before emission, legislation and standards. Cleaning up pollution and restoring the ecosystem after pollution has occurred.
- 23. Economic Growth and Pollution The natural environment plays a key role in our economy, as a direct and indirect inputs. How ? Many rich countries have knowingly polluted the environment, in return for the economic benefits they gain. Much of the cost of this pollution is borne by other countries. Comment.
- 24. The impact of economic growth on the environmental pollution, Growth and pollution The inverted U relation presents between economic growth and environmental pollution. That is the lower stage of economic development, the lower environmental pollution. Environmental pollution is increasing along with industrialization. In the higher stage of economic development, the high-polluting industrial economy turns into service economy or technology-based economy with the changes in the economic structure of the country, and the environmental pollution degree is declining
- 25. The Relationship between economic growth and environmental degradation