1. Unit 6 Lesson 1 What Are Some Natural Resources? Copyright © Houghton Mifflin Harcourt Publishing Company

2. Unit 6 Lesson 1 What Are Some Natural Resources? Natural Resources Copyright © Houghton Mifflin Harcourt Publishing Company A natural resource is something that comes from nature that people can use. The air you breathe and the soil that crops grow in are natural resources. Other natural resources are used to make products you may use.

3. Unit 6 Lesson 1 What Are Some Natural Resources? Natural Resources Copyright © Houghton Mifflin Harcourt Publishing Company A renewable resource is something in nature that can be replaced easily. Trees are a renewable resource. Paper and pencils are made from trees. We can plant more trees to make more paper and pencils.

4. Unit 6 Lesson 1 What Are Some Natural Resources? Going, Going, Gone Copyright © Houghton Mifflin Harcourt Publishing Company Not all natural resources are renewable. Some natural resources will eventually be used up and gone. A nonrenewable resource is a natural resource that can be used up.

5. Unit 6 Lesson 1 What Are Some Natural Resources? Going, Going, Gone Copyright © Houghton Mifflin Harcourt Publishing Company Oil, coal, and natural gas are nonrenewable resources we use to produce different kinds of energy, including electricity. They are fossil fuels―fuels that form over many years from the remains of once-living organisms.

6. Unit 6 Lesson 1 What Are Some Natural Resources? Going, Going, Gone Copyright © Houghton Mifflin Harcourt Publishing Company How can we make sure these resources don’t disappear too quickly? We have to conserve them. Conservation is saving resources by using them wisely. What are some ways that you can use nonrenewable resources wisely? You can start by turning off lights when you don’t need them.

7. Unit 6 Lesson 1 What Are Some Natural Resources? How Do We Use It? Copyright © Houghton Mifflin Harcourt Publishing Company Everything we use comes from nature somehow, including food, water, electricity, and gasoline. Books, shelves, desks, toys—they’re all made from Earth materials. Even glass computer screens are made from sand.

8. Unit 6 Lesson 1 What Are Some Natural Resources? The Effects of Pollution Copyright © Houghton Mifflin Harcourt Publishing Company Pollution is harmful substances in the environment. Smoke in the air is pollution. So are chemicals in water and garbage on land.

9. Unit 6 Lesson 1 What Are Some Natural Resources? The Effects of Pollution Copyright © Houghton Mifflin Harcourt Publishing Company What causes pollution? Pollution often results from people using natural resources. Burning fossil fuels, such as gasoline in cars and coal for energy, can cause air pollution. Land pollution is caused when people don’t put trash where it belongs. When chemicals and wastes run into water, they cause water pollution.

10. Unit 6 Lesson 1 What Are Some Natural Resources? Reduce, Reuse, Recycle Copyright © Houghton Mifflin Harcourt Publishing Company People need natural resources to survive, but we have to use them responsibly. You can help by remembering the “3 Rs”: reduce, reuse, and recycle. To reduce means to use less of something. You can do this by riding a bike instead of riding in a car.

11. Unit 6 Lesson 1 What Are Some Natural Resources? Reduce, Reuse, Recycle Copyright © Houghton Mifflin Harcourt Publishing Company When you reuse something, you use it again. You can take a reusable bag to the grocery store. And you can use a refillable water bottle.

12. Unit 6 Lesson 1 What Are Some Natural Resources? Reduce, Reuse, Recycle Copyright © Houghton Mifflin Harcourt Publishing Company When you recycle something, it is made into a new product. Glass, aluminum cans, paper, plastic bottles, and yard waste can all be recycled. Even the oil from cars can be recycled!

13. Unit 6 Lesson 1 What Are Some Natural Resources? Reduce, Reuse, Recycle Copyright © Houghton Mifflin Harcourt Publishing Company What are some things you do or can do to help recycle?