CHAPTER NEW CHAPTER Human Impact on Ecosystems the

CHAPTER NEW CHAPTER Human Impact on Ecosystems the BIG idea Humans and human population growth affect the environment. 3. 1 Human population growth presents challenges. 3. 2 Human activities affect the environment. 3. 3 People are working to protect ecosystems. CHAPTER OUTLINE

3. 1 KEY CONCEPT CHAPTER HOME Human population growth presents challenges. As the population continues to grow, there is a greater demand for natural resources. Cities and countries share many resources. Increasing populations put pressure on ecosystems. VOCABULARY natural resource population density SECTION OUTLINE

3. 2 KEY CONCEPT CHAPTER HOME Human activities affect the environment. Pollution and habitat loss make it difficult for plants and animals to survive. Without the necessary resources, biodiversity of living things decreases, and ecosystems become less stable. Pollution VOCABULARY pollution biodiversity SECTION OUTLINE

3. 2 KEY CONCEPT CHAPTER HOME Human activities affect the environment. Pollution and habitat loss make it difficult for plants and animals to survive. Without the necessary resources, biodiversity of living things decreases, and ecosystems become less stable. Habitat Loss VOCABULARY pollution biodiversity SECTION OUTLINE

3. 3 KEY CONCEPT CHAPTER HOME Humans are working to protect ecosystems. Working at local and governmental levels, humans are helping ecosystems recover. VOCABULARY conservation sustainable Laws protect endangered species. SECTION OUTLINE

3. 3 KEY CONCEPT CHAPTER HOME Humans are working to protect ecosystems. Working at local and governmental levels, humans are helping ecosystems recover. VOCABULARY conservation sustainable Researchers are investigating alternative resources. SECTION OUTLINE

3. 1 KEY CONCEPT CHAPTER HOME Human population growth presents challenges. I. Human population growth presents challenges. A. The human population is increasing. B. Human populations can put pressure on ecosystems. VOCABULARY natural resource population density 1. Pressures of Waste Disposal 2. Pressures on Resources 3. Pressures of Urban Growth 4. Pressures of Expanding Land Use KEY CONCEPT SUMMARY

3. 2 KEY CONCEPT CHAPTER HOME Human activities affect the environment. II. Human activities affect the environment. A. Humans use many resources. 1. Renewable Resources VOCABULARY pollution biodiversity 2. Nonrenewable Resources B. Pollution endangers biodiversity. 1. Air Quality 2. Water Quality 3. Pollution Across Systems C. Habitat loss endangers biodiversity. 1. Removing Habitat 2. Changing Habitat KEY CONCEPT SUMMARY

3. 3 KEY CONCEPT CHAPTER HOME Humans are working to protect ecosystems. III. Humans are working to protect ecosystems. A. Environmental awareness is growing. 1. Local Efforts VOCABULARY conservation sustainable 2. Federal Efforts B. Conserving resources protects ecosystems. 1. Improving Resource Use 2. Reducing Waste and Pollution C. Think globally, act locally. KEY CONCEPT SUMMARY