There is no ________ in space. (a pulling force that keeps objects on the ground)
gravity
_________ the waste of food. (to make less in amount and size)
Reduce
Try your best to ______ objects before throwing them away.
reuse
________ is very important. It will help Earth a lot.
Recycling
The ________ destroyed many trees in the mountain. (the falling of rock, mud, soil down a steep slope)
landslide
After the building was destroyed, there was ______ everywhere.
debris
