Advantages from building dams include delivering more water and energy to local populations, expanding surrounding riparian habitats and controlling floods, while disadvantages include harm to the plants and animals in local environments, decrease in natural diversity and structural instability of the nearby riverbed and riverbanks. Dam construction directly influences the surrounding environment, and impacts economies and societies too. Proponents support dam building on the basis that dams, large and small, bring jobs and revenue into local economies, and help societies modernize and develop greater complexity.Know More
Since the times of ancient Egypt, societies around the world have used dams for transporting water and irrigating crops. They bring critical supplies of water to people in surrounding areas, and allow the growth of crops and plants. Dams can even provide political stability internally, helping governments allocate and control distribution of water among residents. They improve political and economic relations among neighboring countries too, when dams cross national borders.
Dams also provide novel sources of renewable energy in the form of hydroelectric power. Their construction might improve quality of life for some species in local environments, including non-native organisms, but can negatively influence environments as well. Dams change the nutrient content in waters downstream and alter water temperatures, which in turn affects the growth of populations. They sometimes necessitate costly repairs and maintenance, and dam breaks create safety hazards.Learn more about Environmental Science
Advantages of clearcutting include the ability to manage forests economically, the creation of sunny spaces for sun-loving plant species, and the development of forage habitats for deer, elk and wildlife. Disadvantages include the disruption of existing ecosystems, the unsightly appearance and increased risk of erosion.Full Answer >
Fragile ecosystems are local environments that are extremely sensitive to changes in temperature, air and water quality and other environmental conditions. Like plants and animals, some ecosystems are hardier than others. Fragile ecosystems are among the most frail: even small changes in rainfall patterns or seasonal temperatures can have significant harmful impacts on these ecosystems and reduce their functional capacities.Full Answer >
Dams work by controlling the flow of large bodies of water through a turbine propeller, which turns so that a generator can produce electricity. So, a dam converts the energy of water that is flowing ultimately into electricity.Full Answer >
Advantages of nationalizing commercial banks in India include ensuring that all citizens are able to access funds, and improved regulation of how money is used by borrowers; a significant disadvantage of nationalization is reduced competition, meaning less incentive for the bank to modify services and rates. Proponents of a nationalized bank believe that because the bank is mandated to serve its citizens, it is more inclined to service the disadvantaged, such as low-income earners and remote communities.Full Answer >