Forests have been called the "lungs of the earth" because animals inhale oxygen and exhale carbon dioxide in the process of breathing, and plants take in carbon dioxide and give off oxygen in the process of photosynthesis.
(Forests; have been called; the "lungs of the earth; because animals inhale oxygen and exhale carbon dioxide in the process of breathing) (animals; inhale; oxygen and exhale carbon dioxide) (plants; take; in carbon dioxide) (plants; give off; oxygen; L:in the process of photosynthesis)
Forests animals plants plants
have been called inhale take give off
the "lungs of the earth because animals inhale oxygen and exhale carbon dioxide in the process of breathing
oxygen and exhale carbon dioxide
in carbon dioxide
oxygen L:in the process of photosynthesis