the environment -- Sustainable development
has a beautiful natural environment. Because we have lots of land
and a small population, most of our country is wild and unspoiled.
However, it is becoming harder to preserve our environment as
our population and cities grow. Pollution helps cause large-scale environmental
problems, such as acid rain. And as more people use and live in
natural areas, threats to the environment increase.
are very concerned about environmental issues. They know that damage
to the environment can be hard to fix.