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Waste in Our World: Methods of Waste Disposal

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BC: http://1.bp.blogspot.com/-ji_PwzOSr_M/TkVU7baEGyI/AAAAAAAAAFQ/zOIImDJzGEs/s1600/ParkTrashCan.jpg http://commons.wikimedia.org/wiki/File:Former_landfill,_Soothill_-_geograph.org.uk_-_1597654.jpg http://farm5.staticflickr.com/4045/4383803843_6e255fa4e9_z.jpg?zz=1 http://farm6.staticflickr.com/5217/5471047557_4dc13f5376.jpg http://commons.wikimedia.org/wiki/File:US_Navy_081003-N-2456S-020_Aviation_Electronics_Technician_Airman_Eric_Syck_burns_trash_in_the_incinerator_aboard_the_aircraft_carrier_USS_Theodore_Roosevelt_%28CVN_71%29.jpg https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSiOJ5xvjQOROnQoN7Su_AIleb22oLmgXbJUvaRG6ycyvXeVAWTEg http://www.pilcherphotographics.com/wp-content/uploads/2013/02/090904-01-great-pacific-garbage-patch-gyre-ocean-trash_big.jpg http://www.flickr.com/photos/kqedquest/2785503884/ http://www.acfonline.org.au/get-involved/take-action/cash-containers http://t1.gstatic.com/images?q=tbn:ANd9GcQVaZmFhbeNwe1KfN2xxoshAOJfe5YsJvSr6jsSl8819EcR22ayaQ https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQgbhzg5EnfJxqBxn3rKNvZzByfVpzhYhFYNrleFMZvX0rEOAhx https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRQQkrOvv0eZpHM9kxPgzLwXDmCMpcZCMv54bV5qWKmXrDMC2fT9A https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQ7NlrHUWtu1upqmO9lgevnmj2sUSFbM0wS777_1rccwzpPQcn0RQ | Photo Credits

FC: Waste & Our World: Methods of Waste Disposal An e-book for Grade 4 Science Students in Alberta

1: Throughout our Waste in Our World Unit, we will be learning about the many ways that people impact the environment. | This e-book includes information regarding four different methods for the disposal of household waste materials; this book doesn't discuss reusing, recycling or composting of household materials - well be looking at those ideas a little further into our studies.

2: People create waste through many activities. Most of us are familiar with "garbage day" - where we take our household garbage to the curb and the garbage truck takes it away. | Problem solved - right?

3: But...what happens next? Where does that garbage end up?

4: In some parts of the world, the garbage is simply taken somewhere and thrown into a pile. This is what is known as a garbage dump. | Once a very common way to get rid of our trash, garbage dumps are no longer considered to be an environmentally effective solution to our waste disposal needs.

5: The waste in garbage dumps isn't able to break down or decompose appropriately; it generally remains a giant smelly mess. | If garbage dumps aren't considered environmentally effective, what do we do with our waste today?

6: Burning Waste | Sometimes waste is burned. One advantage is that the waste is gone quickly and it doesn't cost much money. The negative side is air pollution. Some communities use incinerators to burn waste and create energy. Burning solid and liquid waste is not a good or safe idea. Some waste materials pollute the air when they are set on fire. By burning waste, we are creating even more environmental problems.

7: Air quality is an important issue, so are the production of greenhouse gas and toxic chemicals released into the air as waste burns. | Although incinerating is an effective method to "get rid" of waste materials, it is generally not considered to be environmentally effective. | So... Garbage Dumps = X Incineration = X... What else is there?

8: Ocean Dumping | Each of the world’s oceans contains floating garbage that has been dumped into the water and then is collected by ocean currents. The garbage in these “Ocean Dumps” doesn’t break down completely and can poison fish, birds and other animals.

9: Similar to incineration, Ocean Dumping appears to "get rid" of the problem, but, in reality, the waste we pump into the ocean is still a problem. Ocean dumping is also not considered to be an environmentally effective method of waste disposal.

11: So far, we've learned that garbage dumps, incineration and dumping waste into the ocean are not considered environmentally friendly methods of waste disposal. | But...where does our garbage go? Where does that garbage truck take our household waste? | Flip the page to see the most environmentally effective method of waste disposal.

12: Sanitary Landfills | Sanitary Landfills look like garbage dumps, but they have a few very important differences that make them the most environmentally effective method of waste disposal.

13: Difference #1 | Sanitary Landfills are located where the soil is made primarily of clay. | Difference #2 | Sanitary Landfills are located away from aquifers. | Difference #3 | Sanitary Landfills are pickier in the type of waste they will allow into the landfill.

14: How Do Sanitary Landfills Work? | Landfill waste is placed in a large pit with a clay liner and a plastic liner to keep leachate from mixing with ground water. The leachate is carried by special pipes to a plant for treatment.

15: Every day the waste is covered with dirt. When the pit is full, it is covered with topsoil for plants to grow.

16: Throughout this e-book you have read about four different methods of household waste disposal. Each of these methods has a different and unique impact on our environment, both locally, regionally and globally. | Now that you've finished reading, you have a few tasks to complete: 1. You will be creating your own e-book about a topic introduced in this book. For this assignment, you will be role-playing as an activist attempting to change the method of disposal used within your community. 2. The book you create will be used to persuade your audience to support the change from either garbage dumps, incineration or ocean dumping to the creation of a sanitary landfill. When creating your book, refer to the information shared within this book to support your argument. 3. Use our classroom mixbook account (www.mixbook.com - talk to your teacher to get the proper login information) to create your persuasive book. | Now What?

17: Assignment Requirements | While creating your e-book, be sure to meet the following requirements. The book you create must: | - explain why you believe your community should change the method of disposal from either garbage dumps, incineration or ocean dumping to the creation of a sanitary landfill - refer to information contained within this book (or other teacher-approved sources) to support your argument - be at least 12 pages long - contain text and images on every page - contain a complete list of resources (use the resource page in this book as an example | Once you've completed your book, post a link to the classroom website.

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  • By: Paul P.
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  • Title: Waste in Our World: Methods of Waste Disposal
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