The deaths of her infant brothers, the outbreak of a cholera epidemic on the ship her family took to America from England, and the premature death of her father reinforced Elizabeth's determination to become a doctor
Explains the natural patterns by which plants and animals depend upon each other and the environment for food, and emphasizes the dangers of pesticides and other human interference with the ecosystem.
Explains how swamps and marshes are formed, describes the plants and animals that live in them, and discusses the importance of wetlands in nature's overall pattern