Humans have influenced the world around them since they first walked on Earth. Hunting has impacted animal populations. Pollution and deforestation have affected habitats. Humans have also worked to protect the environment through preserves and breeding programs. In this title readers will learn about both the positive and negative impacts humans have on the biosphere. Meets Next Generation Science Standards.

What is the biosphere? -- Human influence -- Modern impacts on the biosphere -- Protecting the biosphere -- How can humans help?.