1
_________ means you can discard it after use.
2
They are developing new plastics that __________ in just a year.
4
The phrase ¨If were you¨ is used go give ___________
5
These are what are disappearing because we are cutting down trees.
6
Don´t ________ away that aluminum can. Recycle it!
7
This metal is an alloy of iron .
