uninstalling ports

[Alejandro Aragon]

Hi everyone,

I need to free up some space and now I see that the /opt folder has  
12.2GB used. After invoking 'sudo port installed', I see that there  
are way too many ports that are installed but not active, so I thought  
that I may uninstall them. Instead of going one by one (because there  
are too many), is there a way to uninstall all inactive ports?

Thank you all,

Alejandro Aragón