QUESTION 18 Which energy source requires no fuel inputs and thus uses no water a
ID: 294211 • Letter: Q
Question
QUESTION 18 Which energy source requires no fuel inputs and thus uses no water and releases no solid waste? Oil Geothermal power O Coal O Natural gas QUESTION 19 Which form of renewable energy requires the flooding of large watershed ecosystem areas? Biomass OTEC Hydropower Geotherma QUESTION 20 What effect do subsidies have on prices and consumption of goods and serviçes? O They lower both prices and consumption so that they have a positive impact on the environment They have the effect of raising prices so high that people cannot afford the goods and services They keep prices artificially low, encourage consumption, and in the long run lead to environmental degradation They have no effectExplanation / Answer
18 If we see oil, coal and natural gas; we know that they all require fuel to get continuous energy but if we talk about geothermal energy than it used the temperature differential which is present as we go under the surface of earth as the geothermal gradient is approximately 30o Celsius per kilometre of depth and this heat energy is used to produce other form of energy therefore option b geothermal energy is the correct answer.
19. The hydropower energy uses a water reservoir which fed water into the turbine. This turbine convert the kinetic energy of the water into electric energy. But this also requires building up of dam which occupies large water shed ecosystem areas and hence option c hydro energy is correct.
20. We know that if the prices of any produce comes down then people will use it indiscriminately. Now if we consider the case of subsidies then basically it’s a measure to decrease the cost of a product incurred by the consumer by giving a part of the cost by some other agency (governments, NGO’s etc.) and hence it artificially decreases the cost of the resource which will have a positive effect on the consumer and they will use it in more quantity. And hence option c is correct.