Advanced Earth Day-themed Crossword Puzzle
Listed Items
- 1.  Can be found in oceans, lakes and rivers
 
- 2.  The color of a four-leaf clover
 
- 3.  Substances that make air, water, or land dirty
 
- 4.  The sun's energy source
 
- 5.  Home planet
 
- 6.  A layer of the atmosphere that protects us from harmful UV rays
 
- 7.  A current of air moving in a particular direction
 
- 8.  Process of using something again
 
- 9.  A large area of land with many trees