||Humans have changed
the appearance and use of the land on Earth.
||Human beings cut
down forests and drained wetlands.
these ecosystems with towns and farms.
||A natural process the
ability to change the landscape as well.
energy to wash away river banks.
||One drought the
capability of creating a desert.
||A pest or diseasethe
potential to kill a forest.
changes like the seasons or longer like the ice ages
that altered the global climate over thousands of
||Ecosystems and humanityaltered
the atmosphere, water and land.
||Of all the parts of the environment, the land seems
the most solid and unchanging.