1. You need a ladder...
A. to build nesting boxes
B. to collect rubbish from the tree house
C. to teach the cycle of life
2. You need a plastic bag...
A. to save electricity
B. to collect rubbish
C. to recycle old batteries and electronics
3. You need a book
A. to build nesting boxes
B. to read about ecology
C. to save electricity
4. You need a spade
A. to plant a tree
B. to save water
C. to recycle cans
