Lecture 3

Question 1

pollution

Answer 1

air - greenhouse gases
water - waste disposal and drainage
soil - landfills, pesticides, erosion

Question 2

climate change

Answer 2

GHGs - greenhouse effect
global warming
changes in precipitation
extreme weather events
rise in sea level
crop yield

Question 3

acid rain

Answer 3

caused by sulphur dioxide and nitrogen dioxide

damage plants, buildings, lakes

Question 4

ozone depletion

Answer 4

invisible protection layer to protect from suns rays
chlorofluorocarbons damage it

skin cancer, sunburns, faster aging

Question 5

overpopulation

Answer 5

7.75 (20220)
8.5 (2030 projection)

Question 6

challenges of environmental sustainability

Answer 6

polution
climate change
acid rain
ozone depletion
overpopulation
natural resource depletion
waste disposal
deforestation
loss of biodiversity
acidification of ocean (8.1 pH)
public health issues

Question 7

planetary boundaries

Answer 7

nine planetary boundaries

safe threshold and critical threshold
critical approaching

Question 8

reduce I in IPAT (CO2)

Answer 8

design for environment
more efficient systems/processes
linear to circular economy
fossil-based to renewable energy
less waste
individual to shared consumption
reuse and recycling

Question 9

recycling aluminum cans

Answer 9

60 days to recycle and reuse
95% less energy to recycle than make brand new
no limit of times recycled

Question 10

recycling glass

Answer 10

cuts water pollution 50%
no limit of times recycled

Question 11

recyling paper

Answer 11

reduces air pollution 95%