Energy Production

1
Energy Production Carbon Emissions
2
Why Do We Need Energy?

• Energy is the ability to do work.
• We must have energy in order to survive. This
  means that our society has to develop ways to
  produce the energy that we need.
• Energy is needed for
• Transportation
• Food Production
• Manufacturing
• Medicine/Healthcare
• Housing/Shelter
• Basically, without the energy to satisfy our
  basic needs we die!

3
Sources of Energy

• We can harness different sources of energy and
  convert it into the types of energy we need such
  as electricity and heat.
• There are two main categories of energy sources
  they are based on how long it takes to replace
  the energy they give us.
• Renewable Energy These sources of energy are
  replaced almost instantaneously. They are
  available for use each and every day.
• Non-renewable Energy These sources of energy
  take a very long time to replenish them selves so
  once they are used, you must wait a very long
  time before they are replaced.

4
Solar Energy

• Renewable Energy
• Using the energy of the Sun to produce
  electricity.
• Solar energy generates clean, reliable power that
  requires little maintenance.
• The energy of the Sun is free and it produces no
  carbon dioxide once it is in place!

5
Solar Power
6
Geothermal Energy

• Renewable Energy
• The energy of the Earth is pumped up into
  buildings through a series of underground pipes.
• In the summer, the heat created in a building can
  be sent into the Earth to be discharged.
• Geothermal energy is cheap and produces almost no
  pollution or greenhouse gases.

7
Geothermal Energy
8
Hydropower

• Renewable Energy
• The kinetic energy of water flow by a turbine
  produces electricity.
• Large hydro dams can store water when energy is
  abundant (like a battery).
• Water is free and produces very little pollution
  or greenhouse gases.
• The impact of the dam on wildlife must be
  considered before a dam should be constructed.

9
Hydropower
10
Wind Energy

• Renewable Energy
• Using the kinetic energy of moving air masses
  (the wind) to spin a turbine and create
  electricity.
• Becoming cheaper to start, creates little to no
  pollution or greenhouse gases.

11
Wind Energy
12
Nuclear Energy

• Non-renewable Energy
• A radioactive material (such as uranium) breaks
  down and provides energy that is converted into
  electricity.
• It is a costly way to produce energy and the
  mining of the uranium consumes a lot of energy
  and produces a fair amount of carbon dioxide.
• Water from nearby sources is used to cool the
  reactors can have negative environmental
  effects.

13
Nuclear Energy
14
Coal

• Non-renewable energy
• Coal is a fossil fuel that is combusted to
  provide energy that can be converted into
  electricity.
• Coal is the biggest threat to the environment
  it does not burn clean and produces the most
  carbon dioxide and pollution per unit.
• It is still used today because it is so easy and
  cheap to access.

15
Coal
16
Oil Natural Gas

• Non-renewable Energy
• These fossil fuels are combusted and the energy
  releases is converted into electricity.
• Both of these contribute carbon dioxide and
  pollution to the atmosphere.
• Neither is as bad as coal though.
• The exploration, extraction and refining of oil
  and natural gas causes a lot of environmental
  stress.
• Still used because its is a cheap and easy
  process.

17
Oil Natural Gas
18
Some Final Questions

• If renewable energy sources produce a lot fewer
  greenhouse gases, why are we not using them?
• Who is in charge of saying what type of energy
  resources we use to produce our energy?
• What do you think will happen when the oil on
  Earth starts to become scarce?

19
The End