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Human Impacts on Ecosystems: Calgary Then and Now

Explore how humans meet their basic needs relying on natural resources like trees, water, and minerals, impacting the environment. Learn about Canada's natural resources and how human impacts have changed over time as the population and technology advanced. Understand the difference between wants and needs, with examples of luxury versus survival essentials.

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Human Impacts on Ecosystems: Calgary Then and Now

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  1. Human Impacts on Ecosystems Topic 2 Unit 1 Science 7

  2. Humans affect the environment around them as they meet their needs.

  3. Calgary – then and now

  4. To meet our basic needs we rely on the ecosystem around us, just as all living things do. • We use natural resources (the materials and products that are found in nature) to meet our basic needs.

  5. Examples of natural resources: • Trees • Water • Oil • Minerals

  6. Canada’s Natural Resources • Video (3:17)

  7. Human impacts can be large or small • If one person drives a car the impact is not that great, but when millions of people drive cars the impact is large. • Our impact on the environment has changed over time as the human population has increased and our technology has advanced

  8. Wants vs Needs • A need is something you require for survival • A want is something you can live without, but it makes your life more enjoyable. • EX: food is a need, but having food from distant locations available year-round is a luxury.

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