Waste Disposal and RecyclingSec. 4-2

Objectives

E.4.2.1 Name three methods of solid waste disposal.

E.4.2.2 Identify ways people can control the solid waste problem.

E.4.2.3 Explain how hazardous waste can be disposed of.

Problems of Waste Disposal

What are three methods of disposing of solid waste?

Burning

Burying

Recycling

Each has advantages and disadvantages.

Incineration

Some garbage is burned in giant furnaces called incinerators.

Advantages:

Doesn’t need landfill space.

Can be used to make electricity.

Incineration

Disadvantages:

Expensive

Still have waste to dispose of.

Release a lot of pollution.

Incineration

Landfills

A landfill is basically a giant hole in the ground where people bury garbage.

Landfills

Landfills

Landfills

Landfills

Bauxite

Mostly Mined in Australia

Recycling

What Can Be Recycled?

Precycling

Compost

Compost

A Natural Cycle