• Energy resources are the main sources of
energy from which the energy can be
extracted and utilized for mankind.
• All forms of energy are stored in different
ways, in the energy sources we use every
• day.
• Energy is a key input in economic growth.
The growth of a nation largely depends
on the availability of energy resources.
The energy resources can be classified on
the basis of:
Usability of energy resources,
Traditional usage of energy resources,
Long-term availability of energy resources,
Commercial application of energy resources,
and
Origin of energy resources.
Renewable N on r en ewabl
e
Non-renewable energy sources
Oil Coal Natural gas
Oil, coal and natural gas are examples of fossil fuels.
They were formed from biological deposits over the
course of millions of years.
There is a finite amount of these materials on the Earth
so they will run out eventually.
Once they are used up they cannot be regenerated and
used again.
Renewable energy sources
These will not run out
because they can easily be
regenerated.
Examples are wind power,
solar power, tidal power and
biomass.
Fuels may be solid, liquid or
gaseous
Fossil fuels may be coal,
petroleum- crude derived or
natural gas.
Fuels are substances which,
when heated, undergo chemical
reaction with an oxidizer,
typically oxygen, to liberate
heat.
Commercially important fuels
contain carbon and hydrogen and
their compounds, which provide
heating value
These fuels were dug out of the ground. They had taken millions
of years to make and so are called FOSSIL FUELS and are
NON-RENEWABLE.
Made from the remains of plants which
COAL died millions of years ago
Coal is a solid fossil fuel that is formed
in several stages as the buried
remains of land plants that lived 300-
Increasing heat and carbon content
Increasing moisture content
Peat Lignite Bituminous Anthracite
(not a coal) (brown coal) (soft coal) (hard
coal)
Heat Heat Heat
Pressure Pressure Pressure
Extensively used Highly desirable
Partially Low heat content;
as a fuel because fuel because of its
decayed plant low sulfur
of its high heat high heat content
matter in content; limited
content and large and low sulfur
swamps and supplies in most
supplies; normally content;
bogs; low heat areas
has a supplies are
content
high sulfur limited in most
content areas
OIL and NATURAL GAS (Methane)
Made from the decayed remains of sea creatures which
died millions of years ago
Fossil fuels are arguably
one of the most valuable
natural resources in
modern times. It is
estimated that 86 percent of
the world’s energy comes
directly from burning fossil
fuels. Fossil fuels are the
source of energy for almost
every machine, including
the generators that produce
electric energy.
Because fossil fuels take so
long to form, they are being
consumed faster than they
can be produced. Fossil
fuels are a major contributor
to air pollution because
when they are burned they
release many dangerous
gases such as nitrogen
dioxide, methane, and
carbon dioxide.
When isotopes of uranium and
plutonium undergo controlled
nuclear fission, the resulting heat
produces steam that spins turbines
to generate
The uranium electricity.
oxide consists of about
9 7 % nonfissionable uranium-238 and
3 % fissionable uranium-235.
The concentration of uranium-235 is
increased through an enrichment
process.
