Science Return to Book List
Penguins
Grade 3
Topic Cloze Quiz
 
 

Type your name:

Conserving Earth’s Resources

When harmful substances get into air, water, or land, occurs. Natural pollution happens when a erupts and pollutes the air. Polluted water happens naturally when too much soil or settles in a lake. Then the lake isn’t a good place for fish and plants to live. People can cause pollution by using to keep plants healthy. Fertilizers can soak into the ground and into supplies.