Part 1 List at least three advantages and three disadvantages of biofuels. (b) E
ID: 118809 • Letter: P
Question
Part 1
List at least three advantages and three disadvantages of biofuels.
(b) Explain the impact of biofuels on global warming.
Part 2
Considering that wind energy can potentially provide upward of 4000 billion kWh/yr power (more than the U.S. annual electricity consumption)in this country, list at least three reasons limiting the ability of having all our electricity provided by wind alone.
Briefly explain the sources of energy in wave and in tide energy systems.
Between wave and tide energy worldwide, which one has a larger potential and why?
Explanation / Answer
SOLUTION:-
There are following advantages and disadvantages of using bio-fuel.
First generation biofuels can save up to 60% carbon emissions and second-generation biofuels can save up to 80%, Biofuels will create a brand new job infrastructure and will help support local economies. This is especially true in third world countries, There can be a reduction in fossil fuel use, Biofuel operations help rural development, Biodiesel can be used in any diesel vehicle and it reduces the number of vibrations, smoke and noise produced, Biodiesel is biodegradable.
Disadvantage :Biofuels are neither carbon neutral or negative as all the processes which are used to create them such as transportation, fertilizer manufacturing, fuel used for machinery, et cetera., Biofuel may raise the price of certain foods, which are also used for biofuel such as corn, Biofuel development and production is still heavily dependent on Oil.
As other plants are replaced, soil erosion will grow, A lot of water is used to water the plants, especially in dry climates, Deforestation in South America and South Eastern Asia causes loss of habitat for animals and for indigenous people living there, New technologies will have be developed for vehicles for them to use these fuels. This will increase their prices significantly
Affect of biofuel in terms of global warming are follows: Oceans have risen several hundred feet. People (and woolly mammoths) could once walk from England to France on dry land. No more. Human habitations that were along shorelines are now hundreds of feet underwater. The receding glaciers have exposed billions of acres of land for forests, farming and cities. Even Greenland once had farms on it until it got colder again about a thousand years ago. The salinity of the oceans has decreased due to all the fresh water added by melting ice. Carbon dioxide levels began to rise about 800 years after the warming cycle began. This is due to warming oceans releasing CO2 and as the ice retreats it thaws out the land underneath, allowing vegetation to rot. Also, increasing volcanic activity is one contributor, which increases atmospheric CO2.