Hydrogen car

A hydrogen
vehicle is an
alternative fuel
vehicle
that uses
hydrogen as its
onboard fuel for
motive power. The
term may refer to
a personal
transportation
vehicle, such as an
automobile, or any
other vehicle that
uses hydrogen in a
similar fashion,
such as an aircraft.
The power plants
of such vehicles
convert the
chemical energy of
hydrogen to
mechanical energy
either by burning
hydrogen in an
internal
combustion engine
, or by reacting
hydrogen with
oxygen in a fuel
cell to run electric
motors.
Widespread use of
hydrogen for
fueling
transportation is a
key element of a
proposed
hydrogen
economy
.
Hydrogen fuel
does not occur
naturally on Earth
and thus is not an
energy source, but
is an energy
carrier. Currently it
is most frequently
made from
methane or other
fossil fuels.
However, it can be
produced from a
wide range of
sources (such as
wind, solar, or
nuclear) that are
intermittent, too
diffuse or too
cumbersome to
directly propel
vehicles.
Integrated wind-
to-hydrogen
plants, using
electrolysis of
water
, are exploring
technologies to
deliver costs low
enough, and
quantities great
enough, to
compete with
traditional energy
sources.

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