2.2 anthropogenic factors affecting climate change

Question 1

Why burning of fossil fuels

Answer 1

Create energy for human activities

Question 2

Effects of burning fossil fuels

Answer 2

Fossil fuel=high carbon content
Contribute to high emissions of CO2 & GHG
Enhanced GHG effect

Question 3

Why changing land use ( AUI )

Answer 3

-agriculture
-urbanisation
-deforestation
-industrialisation

Question 4

Deforestation (why? Need for what?)

Answer 4

Due to need for
-resources
-land
Impacts
- tree absorb CO2 for photosynthesis
- trees have high carbon content

-burning trees=release carbon
-burning trees; expose soil to sunlight; INCREASE SOIL TEMP; INCREASE SOIL OXIDATION

Question 5

Impacts of deforestation

Answer 5

Trees absorb CO2 for photosynthesis
Trees have high carbon content

Impacts:
-burning of trees=release carbon back to atmosphere
-exposure of soil to sunlight=increase soil temp=INCREASE SOIL OXIDATION

Question 6

What’s soil oxidation

Answer 6

When carbon in soil reacts with atmospheric O2

Question 7

% of greenhouse gas emissions for deforestation

Answer 7

20% for tropical deforestation

Question 8

AGRICULTURE

Question 9

URBANISATION why

Answer 9

To power household activities
-heating
-lighting
-cooling
*To power high concentration of vehicles

Question 10

% of greenhouse gas emissions for urbanisation

Answer 10

78% globally

Question 11

Greenhouse gas effect

Answer 11

1) Shortwave radiation from sun
2) most SWR absorbed by earth surface
-some SWR reflected by clouds

LATER
3) Longwave radiation from earth escapes to space
4) some LWR absorbed by GHG & remitted back to atmosphere

Question 12

So whats the enhanced greenhouse gas effect

Answer 12

More greenhouse gas absorbing the more LONGWAVE RADIATION

*MORE LONGWAVE RADIATION REEMITTED TO ATMOSPHERE

*earths temperature increases

Question 13

Industries (why) (% contributing to GHG emissions)

Answer 13

Fossil fuels burnt for energy for machinery & factory processes

• 43%

Question 14

AGRICULTURE-remember its tied to deforestation

Answer 14

-population growth=clearance of forest
-making space for agriculture (food and stuff)

Question 15

Examples of agriculture

Answer 15

-produce energy for farm machinery
-nitrogen in fertilisers convert to nitrous oxide
-livestock rearing & decomposition (METHANEEEE)

*paddy field; rapid decomposition due to soils high moisture

Question 16

(agriculture) % contributing to greenhouse gas emissions

Answer 16

20% of total methane emissions