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modern
society,
for
the sake
of
health and longevity,
people
has
to
avoid the harmfulness
from
the daily used chemicals. Due to
the
highly
developed technique, various
chemicals
have
been
brought
into
the
families,
from
cosmetics,
acrylic fibers
to
stationery;
they
can
possibly
be
hidden
threat to human health. By
recognizing
the
composition
of
these
chemicals
and
their
hazardness
to
health,
"non-poisonous"
family could only
be
formed
after atoxic or
low toxic
natural substitates
are
replaced.
AFE
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