Fact finders. Humans and our planet

"Find out how humans use water and how to protect the water supply"--Back cover.

"Learn about alternative energy sources such as solar, wind, and geothermal energy, and what they can do to positively affect life on Earth"--Back cover.

The hydrosphere encompasses all water on Earth--from glaciers and ice to rivers and oceans. People use water every day. This title asks the question, how much do you use? Readers will learn how humans use water, how humans positively and negatively affect water, and how to protect the water supply. Meets Next Generation Science Standards.

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.

Nitrogen, oxygen, argon, and carbon dioxide are all gases in Earth's atmosphere. But what happens when there is too much or two little of a certain gas? Readers will learn how every day activities such as driving, heating buildings, and using aerosols release harmful gases into the air and how it affects the air we breathe. Meets Next Generation Science Standards.

Pollution and mining for resources have negatively impacted Earth. Nonrenewable resources will someday run out. Then what? In this title readers will learn about alternative energy sources such as solar, wind, and geothermal energy, and what they can do to positively affect Earth. Meets Next Generation Science Standards.