As you look out your window,
you can probably see many ways humans have affected the local
ecosystems. Anything harmful released into the environment is
pollution. Many people think of pollution simply as trash left by
the side of the road. But there are many other types of pollution as
People also damage ecosystems
by destroying the habitats of many organisms. And we aren't aware of
how shifting the delicate balance of a local ecosystem will affect
the global ecosystem.
To help protect the Earth,
scientists developed a branch of biology that studies the phenomena
that affect the maintenance, loss, and restoration of biological
In this Lesson, we'll look at
how humans are causing environmental degradation. Then we'll
investigate how these and other changes lead to a loss of diversity
of organisms on Earth.
Finally, we'll discuss what can
be done to fix the problems we've already created, and what we need
to do to keep our planet healthy.