Renewable or Inexhaustible Resources Video Lecture | Social Science Class 8 - New NCERT

renewable energy resources are being
developed because we are running out of
fossil fuels at an exponential rate the
wind is produced as a result of giant
convection currents in the Earth's
atmosphere which are driven by the heat
from the Sun wind turbines use the wind
to drive turbines directly the blades
are connected to a housing which
contains gears linked to a generator as
the wind blows it transfers some of its
kinetic energy to the blades which turn
and drive the generator the advantages
are that there are no fuel costs and no
harmful pollutant gases are produced
however they do depend on wind if there
is no wind there's no electricity like
the wind water can be used to drive
turbines directly wave machines use the
kinetic energy of moving water to drive
turbines which then drive the electric
generators another way of using water is
to build a tidal barrage over a river
estuary to make use of the kinetic
energy in the moving water the Barriss
contains electricity generators which
are driven by the water rushing through
the troops in the structure
hydroelectric power stations are downs
built across a river valley the water
high up behind the dam contains
gravitational potential energy this is
transferred to kinetic energy as the
water rushes down through tubes inside
the dam water produced energy is good
because no harmful polluting gases are
produced and tidal barrages and
hydroelectric power stations are very
reliable and can be easily switched on
however tidal barrages destroy the
habitats of ash tree species and
hydroelectricity dams flood farmland and
push people from their homes
the