urban waste

Question 1

waste generation=

Answer 1

population growth causes a lot of waste generation as well as economic development

Question 2

sources of waste

Answer 2

RESIDENTAL= household(food waste, electronics)
INDUSTRIAL= construction(demolition materials)
COMMERCIAL=hotels, restaurants(food waste, plastic)
INSTITUTIONAL=school and hospitals(same as commercial)
CONSTRUCTION AND DEMOLITION=roads
URBAN SERVICES= parks, waste treatment

Question 3

impacts of increasing waste generation

Answer 3

• cost of collecting an treating waste is high
• waste is a large source of methane. also contributes to pollution
• untreated waste can lead to health problems
• cities running out of landfill space

Question 4

methods of waste management-HIC VS LIC

Answer 4

• landfill and incineration are most common in HIC’s

- in LIC’s they dispose their waste in open dumps- which is normally not regulated

Question 5

recycling

Answer 5

recycling=when material of items are made into new products
P=low cost for industries and saves energy from manufacturing new products
N= informal recycling can cause toxic waste to be disposed

Question 6

energy recovery

Answer 6

involves burning waste at high temps to reduce amount of waste and to produce electricity
P=generates money and electricity can be used locally
N= produces ash which contains toxins

Question 7

submarine dumping

Answer 7

the dumping of waste out at sea
P=its easy, out of site and cheap
N=damages marine wildlife and habitats

Question 8

composting=

Answer 8

using left over waste products to turn into compost which can be used for plants
P=reduces the need for chemical fertilisers
N= takes time and energy which people dont have

Question 9

incineration

Answer 9

incineration of waste can reduce the volume of disposed waste by 90% as it involves the combustion of organic substances in waste

Question 10

landfill

Answer 10

disposal of waste by burying it and covering with soil

-HIC’s have stricter regulations about the types of material that can be sent to landfill

Question 11

incineration-positives and negatives

Answer 11

P=reduces volume of waste
can reduce toxicity of waste
can be used to produce energy
N= expensive
not all waste is combustible
air pollution

Question 12

landfill- positives and negative’s

Answer 12

P=different types of waste can be accepted
strict regulations in HIC’s
often opposed by residents
potential leaching of chemical that can threaten groundwater supplies
decaying matter produces methane
it takes up a lot of space