MIDTERM - PPT 4

Question 1

any unwanted or discarded material we produce that is not a liquid or a gas. Solid waste can be divided into two types.

Answer 1

Solid waste

Question 2

produced by mines, agriculture, and industries that supply people with goods and services.

Answer 2

Industrial solid waste

Question 3

often called garbage or trash, which consists of the combined solid waste produced by homes and workplaces.

Answer 3

Municipal solid waste (MSW),

Question 4

which threatens human health or the environment because it is poisonous, dangerously chemically reactive, corrosive, or flammable.

Answer 4

Hazardous or Toxic, waste,

Question 5

in which we attempt to reduce the environmental impact of MSW without seriously trying to reduce the amount of waste produced.

Answer 5

waste management

Question 6

in which much less waste and pollution are produced, and the wastes that are produced are viewed as potential resources that can be reused, recycled, or composted.

Answer 6

waste reduction

Question 7

a variety of strategies for both waste reduction and waste management

Answer 7

integrated waste management

Question 8

Waste reduction is based on _____

Answer 8

three Rs

Question 9

are essentially fields or holes in the ground where garbage is deposited and sometimes burned. They are rare in developed countries but are widely used near major cities in many developing countries.

Answer 9

Open dumps

Question 10

solid wastes are spread out in thin layers, compacted, and covered daily with a fresh layer of clay or plastic foam, which helps to keep the material dry and reduces leakage of contaminated water (leachate) from the landfill.

Answer 10

sanitary landfills

Question 11

Two types of landfills

Answer 11

Open Dumps
Sanitary Landfills

Question 12

The first step in dealing with hazardous wastes is to collect them.

for detoxifying hazardous wastes include using charcoal or resins to filter out harmful solids and distilling liquid mixtures to separate out harmful chemicals. Especially deadly wastes can be encapsulated in glass, cement, or ceramics and then put in secure storage sites.

Answer 12

Physical methods

Question 13

The first step in dealing with hazardous wastes is to collect them.

are used to convert hazardous chemicals to harmless or less harmful chemicals through chemical reactions.

Answer 13

Chemical methods

Question 14

Biological methods

One such approach is ____________, in which bacteria and enzymes help to destroy toxic or hazardous substances or convert them to harmless compounds.

Answer 14

bioremediation

Question 15

Biological methods

which involves using natural or genetically engineered plants to absorb, filter, and remove contaminants from polluted soil and water, as shown

Answer 15

phytoremediation

Question 16

The most common form of burial is _________, in which liquid hazardous wastes are pumped through a pipe into dry, porous rock formations far beneath aquifers, many of which are tapped for drinking and irrigation water.

Answer 16

deep-well disposal

Question 17

are ponds, pits, or lagoons into which liners are placed and liquid hazardous wastes are stored

Answer 17

Surface impoundments

Question 18

is an ideal whereby every person is entitled to protection from environmental hazards regardless of race, gender, age, national origin, income, social class, or any political factor.

Answer 18

Environmental justice