cutting down trees has a negative impact on the health of what?
space humankind mars aliens salmon Species humans plants
A B C D E F G H
When ecosystems are healthy, humankind is healthy.
cutting down trees has a negative impact on the health of humankind
cutting down trees has a negative impact on the health of what? (A) space (B) humankind (C) mars (D) aliens (E) salmon (F) Species (G) humans (H) plants