What does "clean up its act" mean?
Last edited by sitifan; 02-Oct-2014 at 17:35.
I need native speakers' help.
'Clean up (one's) act:
To improve one's behavior or performance.'── quoted from http://www.thefreedictionary.com/clean+up+(one%27s)+act
In your context, I take it to mean 'produce less waste' and/or 'recycle the waste'.
Not a teacher.