1. bellringer Add questions and summary to Community Ecology Notes
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2. Learning targets
Summarize the current state and effects of human population growth.
Describe the importance of effective renewable and non- renewable resource management.

3. Human impact on ecosystems

4. Human Impact on ecosystems
As the human population grows, the demand for Earth’s resources increases.

5. Earth’s human carrying capacity is unknown.

6. Human impact on ecosystems
Technology has helped to increase Earth’s carrying capacity.
gas-powered farm equipment
medical advancements

7. Human impact on ecosystems
The growing human population exerts pressure on Earth’s natural resources.
Nonrenewable resources are used faster than they form.
Coal
Oil
Renewable resources cannot be used up or can replenish themselves over time faster than being used. Though if not used carefully, they can become nonrenewable.
Wind
Water
Sunlight
Trees/Animals
Growing use of nonrenewable resources may lead to a crisis. Resources must be properly managed. Earth’s resources must be used responsibly. Careless use of resources makes them unavailable to future generations.

8. Ecological footprint
An ecological footprint is the amount of land needed to support a person. It is a measure of human impact on Earth's ecosystems.
The land must produce and maintain enough
food and water
shelter
energy
waste
Several factors affect the size of the ecological footprint.
amount and efficiency of resource use
amount and toxicity of waste produced

9. What is your ecological footprint?