Land, Water, and Air Resources Chapter 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 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

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)

Recycle materials. To keep them out of the landfills. What People Can do Recycle 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 dropped 3.Flammable: catch fire easily 4.Corrosive: Easily dissolves many materials. The end