Pro and con
For some issues, there are two sides which are
opposite.
The pro side is for the idea, is in favor of the idea.
The con side is against the idea, is opposed to the
idea.
Example: Should Japan stop
using disposable bento boxes?
Pro side: yes, we should stop because
the disposable boxes are unnecessary,
they make pollution when they burn, and
they can't be recycled.
Con side: no we shouldn't stop using them because
they are convenient
they are sanitary
and they don't need to be washed.