Lesson 24 — Activity 3: So Much Waste, What Can Be Done?



Explore

You may be aware that people throw away a lot of garbage every day. Getting rid of garbage is a very important issue, and you will investigate it in this activity.    

                      

 


It is estimated that every day, each Canadian citizen discards about 2.2 kg of garbage. Much of this garbage ends up in landfills. Landfills are sites that have been developed to prevent waste materials from harming the environment.



It is difficult to create new landfills. They are expensive to build, and many people do not want landfills near their homes. When landfills do become full, they are sealed to prevent toxic chemicals from entering the ground water.




What Can Be Done?

In Lesson 4 of the first theme of this course, you learned about waste packaging. Think about your own family. Do you use more concentrated products that require less packaging or more ready-made products that result in more packaging? When you get takeout food from a restaurant, how much packaging is thrown into the garbage?

The images below give us some information about what can be done to reduce the garbage we throw away. You may already know about these methods and may be practising them at home and at school.



Glass jars and plastic bags can be reused, as can other products, such as print materials.


 

Composting food wastes can reduce the amount of garbage produced.




 

Glass, cans, juice boxes, paper products, and plastic can all be recycled. 


 
 


 Remember, as well, that some waste items are biodegradable while others are nonbiodegradable. In Lesson 4, you learned about these kinds of products. Below is a review of this lesson.

Biodegradable or Nonbiodegradable

When you look at the environment around you, do you see things that are biodegradable? Biodegradable means "able to decompose or decay."

Items that are biodegradable are helpful to our environment. Over time, these items break down into smaller and smaller pieces and eventually into particles that occur naturally in the environment.

Paper, vegetable peelings, and natural fibres are biodegradable; they decompose rather quickly. Other items such as glass and plastic are considered nonbiodegradable because they do not break down. Such items are better recycled or reused instead of sending them to the landfills where they will last for centuries, if not forever.




Self-Check

Try This!

Try the questions below on your own first and then click on the tab to check your answers!

Decide if the following statements are true or false.

1. An item that is biodegradable takes a long time to break down in the environment.

2. Landfills are expensive to build, and many people do not want landfills near their homes.

3. Using reusable dishes and cutlery over again can reduce the amount of waste and protect the environment.

4. Landfill sites are not required to be sealed to prevent toxic chemicals from accidentally entering the water cycle.

5. One way to decrease the volume of waste entering landfills is to recycle glass, paper, and plastic.



1. False
2. True
3. True
4. False
5. True







 Digging Deeper

Scientific Inquiry

In L11 — A1, you were introduced to the three types of variables present in a scientific investigation: manipulated, responding, and controlled. Remember that these variables are identified to make sure the results are accurate (correct) and that the experiment could be repeated in exactly the same way, with the same results.


Manipulated variable: what is changed or being tested in order to see what the effect will be

Responding variable: the results that occur because of the manipulated variable

Controlled variable: factors that are kept the same to make sure the results are accurate


You will practise identifying variables in the next assignment.