a) World energy consumption refers to the total energy used by all of human civi
ID: 247576 • Letter: A
Question
a) World energy consumption refers to the total energy used by all of human civilization. What is the percentage (approximately) of the renewable energy consumption in the world? Write a brief critical comment on that. (3 MARKS) b) What is the percentage (approximately) of the renewable energy consumption in Australia? What are the potential renewable resources in Australia to produce energy and biofuels? (3 MARKS) c) Approximately 21% of the energy consumed in Australia is from natural gas and compressed natural gas (CNG) technology, and has been developed and utilised for public transport systems. In Australia, is such an energy platform sustainable and renewable? Justify your answer (4 MARKS)Explanation / Answer
a)Total world energy come from 80% fossil fuels,10% biofuels,5% nuclear and 5% renewable (hydro,wind,solar,geothermal) energy.Only 18% of that total world energy was in the form of electricity.
*comment-very less percentage of renewable energy is consumed by the world.eventhough we try to utilise the renewable energy it is minimum to satisfy the needs of the world energy consumption.
b)total renewable energy consumption in Australia in 2015 was 346 petajoules.
*biomass(wood,woodwaste,and bagasse)-53%
*hydroelectricity-19.2%
*wind-10.7%
*solar -PV 5.11%
*biogas-4.7%
*solar hot water-3.8%
*and biofuels-3.6%
*sum of all energy derived from plant matter-61% 0f Australia total renewable energy consumption.
c)CNG is cheaper than ULP and diesel and also less polluting.
*Australia has an abundant supply of natural gas,esimated to be equal to 184 years of supply.
* It has been suggested that with sufficient public and private sector investment and government policy certainly,Australia could switch entirely to renewable energy within a decade by building additional large scale solar and wind power developments,upgrading to transmission infrastucture and introduction of appropriate energy effciency measures.
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