What is burned to produce heat?
Oak Gold Spruce cellulose Conifers bamboo Plastic Aluminum
A B C D E F G H
Interior woods are birch, spruce and pine.
burning spruce is used to produce heat
What is burned to produce heat? (A) Oak (B) Gold (C) Spruce (D) cellulose (E) Conifers (F) bamboo (G) Plastic (H) Aluminum