What can be used to protect plants from the cold?
ice fibers metal peat keratin oil glass snow
A B C D E F G H
A greenhouse is made entirely of glass.
Glass can be used to protect plants from cold.
What can be used to protect plants from the cold? (A) ice (B) fibers (C) metal (D) peat (E) keratin (F) oil (G) glass (H) snow