Impact of Science & Technology on Environment
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The document discusses both the direct and indirect impacts of science and technology on the environment. Direct impacts include increased use of chemical fertilizers, pesticides and insecticides, which can degrade soil quality over time. Indirect impacts are longer term and include pollution and environmental degradation from excessive chemical use, industrial growth that releases pollutants, and increased CO2 emissions changing soil chemistry and raising global temperatures. Various industrial and agricultural practices are shown to negatively impact air, water, and living organisms through pollution and changes to metabolic processes.
Impact of Science & Technology on Environment
- 1. Impact of Science and Technology on Environment
- 2. Direct or Intentional Impacts Indirect or unintentional Impacts
- 3. Direct or Intentional Impacts Application of Chemical Fertilizers, Pesticides and Insecticides High yield Economic Development Change in Soil Chemistry Soil Degradation
- 4. Indirect or unintentional Impacts • Experienced after long time when they become cumulative • Not reversible • Related to pollution and environmental degradation
- 5. • Use of chemicals such as DDT, BHC, etc., • Excessive use of pesticides, fertilizers and a number of other chemicals • Example: toxic materials are transported across the placenta and reach the developing foetus of women and cause abortions and delivery of premature child
- 6. Industrial Growth and its Environmental Impacts • Industrial expansion – release of enormous quantities of pollutants – ions of chlorine, sodium sulphate, magnesium phosphate etc • Coal consumption in thermal plants – flyash, smoke, sulphur oxide and other gases
- 7. • Burning of hydrocarbon fuels – Increased concentration of CO2 in the atmosphere • Increase in global temperature • CO2 + H2O H2CO3 • Carbonic acid changes the soil chemistry
- 8. O2 + Haemoglobin Oxyhaemoglobin Supply of O2 throughout our body Normal Reaction Carbon mono-oxide + Haemoglobin Prevention of Oxyhaemoglobin Supply of Carbon mono-oxide Abnormal Reaction
- 9. Nitrates in food and water Nitrites by bacteria in digestive system Nitrites enter blood vascular system Combines with Haemoglobin Trigger a lot of metabolic disorders
- 10. • Industrial wastes – chemicals, metals, solid wastes and garbage • Release of CFC (Chloroflurocarbon) – Depletion of Ozone • Sulphur dioxide reacts quickly with Atmospheric moisture – Suphuric acid – Respiratory diseases and Acid Rain