the what is another potential threat in the environment?
Decaying vegetation air causing breathing virus causing smallpox wind causing blowing microorganisms spread disease water causing hydration lung irritants
A B C D E F G H
the what is another potential threat in the environment? (A) Decaying vegetation (B) air causing breathing (C) virus causing smallpox (D) wind causing blowing (E) microorganisms (F) spread disease (G) water causing hydration (H) lung irritants