1. Land, Water, and Air Resources Chapter 4
4.2 Waste Disposal and Recycling

2. The Problem of Waste Disposal
There are three methods of handling solid waste. Burning Burying Recycling
Each method has advantages and disadvantages

3. Burning –Incineration <-vocab word
ADVANTAGES
1. Incinerator buildings take up less space than landfills.
2. Do not pollute ground water
3. The heat can be used to generate power
DISADVANTAGES
1. Possible air pollution
2. Some waste-ash still goes into a landfill
3. They are expensive to build

4. Burying – Landfills page 123
Dumping waste into the ground has been the most common method. .
Rainwater can soak into the dumps and create. . .
. . . LEACHATE , a polluted liquid produced when rain water passes through buried waste in a landfill.

5. Sanitary Landfill <-vocab word picture page 124
Holds waste more safely.

6. Recycling <-vocab word
Matter naturally cycles
(Remember water, carbon-oxygen, and nitrogen)
Biodegradable is any material that can be broken down naturally by bacteria and decomposers
Nature can recycle many things – biodegrade (rot)

7. Non-biodegradable
Many manufactured (man-made) items are not biodegradable
Metal
Plastic
Glass
Paper(can biodegrade but is better to recycle)

8. Recycle materials. To keep them out of the landfills.
What People Can do
Recycle materials. To keep them out of the landfills.

9. Hazardous Waste <-vocab word
Four main types, based on their impact on people and the environment.
1.Toxic-poisons: Can harm all biotic organisms.
2.Explosive: React when exposed to air,
heat or are dropped
3.Flammable: catch fire easily
4.Corrosive: Easily dissolves many materials.
The end