Energy%20and%20Food - PowerPoint PPT Presentation

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Title: Energy%20and%20Food


1
Energy and Food
  • Compiled By Nicholas Mavrelis 13, Adrian
    Drobenko 13, Ryan OHara 13, Alexander Adamis
    13, Taso Velis 13, Keith Spiteri 13, Peter
    Abrahamsen 13, Eugene Dolphin 13, and Michael
    Puerto 13

2
Eight Different Types of Renewable Energy
  • Biofuel
  • Biomass
  • Geothermal
  • Solar Energy
  • Hydroelectricity
  • Tidal Power
  • Wind Power
  • Wave Power
  • Think! How does energy affect food?
  • Why should you care?

3
What is a Biofuel?
  • A biofuel is a type of fuel whose energy is
    derived from the biological reduction of carbon
    dioxide to organic compounds by living organisms.

A bus powered by biofuel.
4
Pros and Cons of Biofuels
Pros Cons
Helps keep the environment clean Can possibly cause other environmental problems and emit other greenhouse gases
Uses natural resources efficiently Requires a mass production of crops
Can be easily implemented Requires more energy than it can generate
Just as efficient as regular gasoline Seen as a temporary replacement, but not a permanent solution
5
What is Biomass?
  • Biomass is a biological material from living, or
    recently living, organisms. It can either be used
    directly or converted into other energy products.

Wood is a common source of biomass.
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Pros and Cons of Biomass
Pros Cons
Made locally with minimal cost Large areas of land are required to use to its full potential
Converts waste into fuel If overused, other environmental issues could develop
Renewable, and does not depend on fossil fuels Some materials are not available all year around
An abundance of organic waste and agricultural waste Very expensive to implement properly
7
What is Geothermal Energy?
  • Geothermal energy is thermal energy generated and
    stored in the Earth.
  • The Earth generates thermal energy from the
    original formation of the planet and from
    radioactive decay of minerals.

A pool fed by a hot spring.
8
Pros and Cons of Geothermal Energy
Pros Cons
Geothermal plants are inexpensive to operate and maintain Geothermal plants and required tools, such as drills, are expensive to start
Almost completely non-polluting Only usable in certain regions
Can be used as a direct power source Current geothermal sources may not be a permanent source of energy
Fossil fuels are not required No guarantee that sites will provide desired quantities
9
What is Solar Energy?
  • Solar energy is a radiant of light and heat from
    the sun and has been used by humans since ancient
    times.
  • Different technologies, such as solar panels,
    allow humans to harness solar energy more
    efficiently.

A solar power plant in the United States
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Pros and Cons of Solar Energy
Pros Cons
Solar panels give off no pollution Solar panels are extremely costly
Solar energy is produced quietly Can only produce energy during the daytime
Can be very efficient in large areas The weather can affect the efficiency of energy production
Reduces the use of fossil fuels Doesnt completely dispose of fossil fuels
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What is hydroelectricity?
  • Hydroelectricity is electricity being generated
    by hydropower.
  • More specifically, it is the production of
    electrical power through the use of the
    gravitational force of falling or flowing water.

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The Gordon Dam Located in Tasmania.
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Pros and Cons of Hydroelectricity
Pros Cons
Dams can store water directly from a river itself Dams require flooding of entire valleys and other areas
In case of a drought, the dam can still have a constant supply of water to produce energy Dams disrupt natural seasonal changes in the river, which could result in destroyed ecosystems
Dams are inexpensive to maintain and operate Dams are expensive to build
Dams can be shut down instantly Dams can break in a massive flash flood
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What is Tidal Power?
  • Tidal power is a form of hydropower that converts
    the energy of tides into useful forms of power,
    primarily electricity.

A tidal stream generator that shows the power in
the tidal current
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Pros and Cons of Tidal Power
Pros Cons
A completely non-polluting source of energy Requires a thorough inspection
A renewable energy Exposure to rotating turbines that manipulate the water can drastically alter marine life
A reliable source of energy Has specific, geographical requirements
Pays off in the long run A high initial investment
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What is Wind Power?
  • Wind power is the conversion of wind energy into
    a useful form of energy.
  • Often requires wind turbines to make electricity,
    windmills for mechanical power, wind pumps for
    water pumping, or sails to propel ships.

A Wind Pump
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Pros and Cons to Wind Power
Pros Cons
Does not pollute the environment such as fossil fuels, coal, and nuclear energy Has several environmental impacts
Its renewable Wind is simply unpredictable
Good availability for wind Requires specific, geographical regions
Cost efficient to operate and maintain Expensive to implement
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What is Wave Power?
  • Wave power is the transport of energy by ocean
    surface waves, and the capture of that energy to
    produce electricity.

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Pros and Cons of Wave Power
Pros Cons
Consistent power Devices that harness energy can easily break down
Causes no pollution Harms marine life
Renewable energy High initial cost
Efficient in harnessing energy Very few are actually implemented
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How does this all relate to food?
  • Food is one of the primary sources for biofuels.
  • If an energy source was cheaper and a more
    efficient energy source was in place, food would
    be extremely cheaper
  • Cheaper food to produce Better Economy More
    People Well Fed

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