Energy can take many forms including heat, light, motion, and potential energy and comes from sources like the sun, wind, water, and nuclear reactions. Renewable energy sources are important alternatives that help conserve finite resources, preserve the environment, and develop sustainable energy systems. Different renewable technologies harness energy from the sun, wind, water, earth, and biomass to generate electricity and heat with benefits like reduced costs, emissions, and energy independence.

1. What is energy?
Energy is all that can be
turned into heat at a low
temperature. “Energy”
comes from the ancient
Greek “enérgheia”,
whose meaning is
effective action.

2. What is energy saving and in what
ways can it be achieved?
• It’s the saving of exhaustible
energy sources.
• You can reach it by using
renewable energy sources
such as the sun, the wind, the
Earth heat.

3. What are the reasons that led to the use of
renewable energy sources?
• They are instrumental in
developing an alternative
energy system.
• They contribute to the
preservation of territory.

4. How is nuclear energy produced?
Nuclear energy is
produced from atomic
nucleus by:
• The fusion of light
nucleuses.
• The fission of a heavy
nucleus.

5. What problems can be caused by nuclear
energy?
The nuclear plants :
• Release enormous quantities
of heat.
• Produce radioactive waste.
Uranium , which is used in
nuclear fission, is not an
inexhaustible energy source.

6. What is a photovoltaic panel?
A photovoltaic
installation turns
solar energy directly
into electricity.

7. What are the advantages of installing a
photovoltaic system?
• Allows to break down the
cost for electricity.
• Assures an income to the
Electricity Network
Manager.
• Allows to have public
contributions for the
starting cost.

8. Does the system still produce energy during
the periods in which there is less sunlight?
• The system allows a better
performance when the sun
temperature is at about 25
degrees Celsius.
• From November to
February the solar panels
produce a lower energy
quantity.

9. Is it possible to install a photovoltaic module
in a public school?
Yes and the prerequisites
are:
• Space availability to
install the “modules”.
• Conditions for a correct
exposure of modules.
Absence of barriers to
the radiation.
In 2007 Liceo Marconi
from Carrara introduced
the use of
a photovoltaic installation.

10. What is district heating?
It’s the distribution of
hot water or vapour to
the houses by means
of insulated
underground pipes.

11. What is wind energy?
• It’s the kinetic energy
coming from the wind
and it changes according
to its speed.
• The wind is conditioned
by the landscape so it’s
possible to locate wind
installations only in some
areas.

12. What are the advantages of district heating?
• Lower environmental
impact.
Energy saving.
Simplicity of use .
Safety from explosion
or poisoning dangers.
• Saving on
maintenance costs
and reparations.
Rationalization in
accounting.
Time and temperature
control system.

13. What is hydroelectricity?
It’s the energy source
which uses the
conversion of the
gravitational
potential energy
originated by water
bodies in high altitude
into kinetic
energy.

14. What is geothermal energy?
It is the energy produced
by underground heat,
coming to the surface by
water-bearing strata, or
water artificially injected
in the subsoil.

22. 800
700
600
500
Eolico
Solare
400 Idroelettrica
Biomasse
Geotermica
300
200
100
0
RENEWABLE ENERGIES PRODUCED IN Mw

23. • Ferdani Matteo
• Marrazzini Gioia
• Panesi Eleonora
• Simonelli Tommaso
• Vannucci Iacopo