land, water, and air resources chapter 4 4.2 waste disposal and recycling
TRANSCRIPT
Land, Water, and Air ResourcesChapter 4
4.2 Waste Disposal and Recycling
The Problem of Waste Disposal• There are three methods of handling solid
waste. Burning Burying Recycling• Each method has advantages and
disadvantages
Burning –Incineration <-vocab word
• ADVANTAGES1. Incinerator buildings
take up less space than landfills.
2. Do not pollute ground water
3. The heat can be used to generate power
• DISADVANTAGES1. Possible air pollution2. Some waste-ash still
goes into a landfill3. They are expensive to
build
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.
Sanitary Landfill <-vocab word picture page 124
• Holds waste more safely.
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)
Non-biodegradable
• Many manufactured (man-made) items are not biodegradable
• Metal• Plastic• Glass• Paper(can biodegrade but is better to recycle)
What People Can doRecycle materials.
To keep them out of the landfills.
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 dropped3.Flammable: catch fire easily4.Corrosive: Easily dissolves many materials.
The end