10. • Ok, so out of our
whole bowl of apple
we only have a small
slice left. Our world
is large yet we only
have a small amount
of natural resources
to work with and we
must use them
carefully. How do we
keep this small slice
the way it is without
using it all up until it
is all gone?
• How can we sustain
it?
• Look at our
definitions and add
to them if you wish.