Human Impact

What does Earth’s human population continue to do?

grow

What continues to grow?

Earth’s human population

Earth’s human carrying capacity is

unknown

What is unknown?

Earth’s human carrying capacity

What technology helped to increase Earth’s carrying capacity?

gas-powered farm equipment and medical advancements

Gas-powered farm equipment and medical advancements are technology that has helped to do what?

increase Earth’s carrying capacity

The growing human population exerts what?

pressure on Earth’s natural resources

What has exerted pressure on Earth’s natural resources?

the growing human population

What are some nonrenewable resources that are used faster than they form?

coal and oil

Coal and oil are examples of what?

nonrenewable resources that are used faster than they form

What are examples of renewable resources that cannot be used or can replenish themselves over time?

wind, water, and sunlight

Wind, water, and sunlight are examples of what?

renewable resources that cannot be used or can replenish themselves over time

What may lead to a crisis?

growing use of nonrenewable resources, because they must be properly managed

What does the growing use of nonrenewable resources lead to because they must be properly managed?

a crisis

Effective management of Earth’s resources will help what?

meet the needs of the future

What will help meet the needs of the future?

effective management of Earth’s resources

What is an ecological footprint?

the amount of land needed to support a person

What is the amount of land needed to support a person called?

an ecological footprint

The land must produce and maintain enough what?

food and water, shelter, energy, and waste

What must produce and maintain enough food and water, shelter, energy, and waste?

the land

What factors affect the size of the ecological footprint?

amount and efficiency of resource use and the amount and toxicity of waste produced

What does the amount and efficiency of resource use and the amount and toxicity of waste produced affect?

the size of the ecological footprint