1. Waste and Our World
Grade Four Review

2. A landfill is a large hole in the ground where garbage is dumped.
Advantages:
No open burning
ultimate disposal
Little odor
Low water/groundwater pollution
Can handle large amounts of wastes
less cost
Filled land can be used for other purposes
Disadvantages:
Noise and traffic
Dust
Air pollution from toxic gases and volatile organic compounds
Releases greenhouse gases (methane and CO2)
Can leak and cause groundwater contamination
Slow decomposition of waste
Encourages waste production
Landfills

3. A factory where garbage is burned.
Advantages:
You do not need a large amount of space
incineration can removes a large amount of trash by reducing it to ashes
Disadvantages :
incineration can pollute the nearby atmosphere
incineration can cause fires and harm to objects around it
incineration can be an eyesore in fancy communities
Incinerator

4. Sending your waste to a factory where it is made into another useful product.
This is usually the last resort for the consumer.
Things we can recycle are paper, cardboard, plastic, juice boxes, and tin.
Recycling Saves Energy
Recycling Saves Natural Resources
Recycling Saves Space for Waste Disposal
Economic Benefits
Recycling

5. Finding other use for a piece of waste or repairing it to use again.
In this case, nothing has to be changed about the piece of waste, you are just reusing it for something new.
Examples:
Empty coffee can to store pencils
Yogurt containers for flower pots
Reuse old clothing or toys by donating
them to charity
Reusing

6. Decreasing the amount of waste you create in the first place by buying only what you really need.
Make smarter and more eco- friendly choices to save the amount of wastes that you have to recycle or that will eventually end up in the landfill.
Buying bag cereal instead of box of cereal
Buying a bulk bag of candy instead of individually wrapped packages of candy
Buying a bag of oatmeal instead of a
box with mini bags inside of it
Reducing

7. Putting organic scraps such as apple peels into a bin where decomposers can eat it.
It goes from your garbage to the garden. This is a great way to use all of your old food scraps and return their nutrients back into the soil to help grow more crops.
Composting

8. What goes in your compost bin?
Green Items for the Compost Pile
Fresh grass clippings
Fresh garden trimmings, flowers, plant leaves
Barnyard manure (horse, cow, chicken)
Garden vegetable leaves and stalks, fallen fruit
Weed leaves, stems and flowers
House plants and potting mix
Brown Items for the Compost Pile
Autumn leaves
Twigs and stalks
Coarse sawdust and shavings
Shredded paper, cardboard, paper towels, napkins, tissues
Don’t forget a lot of kitchen scraps can go into your compost pile, including egg shells, fruits, coffee grounds, grains and corn husks. 
What goes in your compost bin?

9. Hazardous Waste Something that can easily catch on fire is Flammable
Something that can make you very sick or kill you if ingested is Toxic or Poisonous
Something that can burn your skin, eyes, etc. is Corrosive
Something that can easily explode is Explosive
Where does gas, spray can, bleach, and car oil belong?
Hazardous Waste

10. Where do they belong? Fruit peel chip bag toilet tissue
Recycle
Compost
Garbage
Hazardous Waste
Fruit peel chip bag toilet tissue
Old stero diaper potato peel
Half full paint can moldy tomato newspaper
Paper egg shells tin foil
Old phone juice box soup can
Where do they belong?

11. What are three different types of waste found in nature?
Plant waste is Oxygen, dead leaves, grass clippings.
Animal waste is Carbon Dioxide, feces, and scraps from things they eat.
What don’t we see that much plant or animal waste in nature? Waste found in nature is biodegradable and naturally decomposes in a short amount of time.
What can be considered human waste? Humans have created a lot of non biodegradable waste as well as biodegradable waste. Humans have created man made waste that damages our environment. Such things like plastic, hazardous waste, metals, paper, and a variety of other things.
Waste in Nature