Geoscience Reference
In-Depth Information
Global
PercePTion
A global survey of the
many physical changes
that are occurring on
the Earth's surface is
verification that they
are global in extent.
Changes that are truly
global include sea level
rise, mountain glacier
melting, and changes
in plant and animal dis-
tribution. It is difficult
to understand why
deniers question global
change, since these and
other changes are
easily measureable.
