Exercise 1.3: Human Impacts Over Time
1. Humans have the largest impact on the global ecosystem. Some impacts have a positive effect and some a negative effect. Look closely at the list of actions below and explain how the individual in each situation has an impact on his or her environment.
- a child throws her popsicle wrapper on the ground --->
- a snowmobiler creates trails in the mountain snow --->
- a farmer ploughs a field --->
- construction workers build a new community --->
- a biologist adds fish to a lake --->
- a homeowner sprays the dandelions in the lawn --->
2. Explain the difference between basic human needs and wants.
3. Name three materials that are available today that were not available over a century ago?
4. Where do the three materials you list above come from? What are the raw materials?
5. How has the creation of these materials impacted your life? If these materials were not available how would you adjust?
6. How have these materials impacted the ecosystem?
7. How has Canadian society and lifestyles changed in the last 100 years that would cause the amount of garbage that each household produces to increase?
8. Name three things you could start doing today to decrease the amount of household waste your family is producing?