Energy generation

Question 1

Define the term carbon footprint

Answer 1

the amount of CO2 emissions that can be directly or indirectly attributed to an individual’s or companies activities

Question 2

how can companies reduce their carbon footprint

Answer 2

1. recycling
2. maximise energy efficiency
3. analysing chain systems
4. using renewable energy supplies

Question 3

define the life cycle analysis

Answer 3

is a systematic inventory of environmental impacts at every stage of a products life.

Question 4

State the five stages of the life cycle analysis

Answer 4

1. extraction
   2.material processing
   3.part manufacturing
   4.assembly
   5.product use

Question 5

state the advantages and disadvantages of coal

Answer 5

1. reliable.
   2.relatively cheap to extract
   however-
   1.coal mining causes land degradation.
   2.contributes to green house emissions
   3.

Question 6

state the advantages and disadvantages of oil

Answer 6

1.relatively cheap to extract and convert
2. high energy density
however
1. expensive
2.highly polluting
3.risks environmental disasters

Question 7

state the advantages and disadvantages of natural gas

Answer 7

1. cleaner than oil and coal
2. high energy density
3. relatively cheap to convert
   however-
   1.burning gases can be highly polluting

Question 8

define what photovoltaics

Answer 8

this is using solar cell to generate power by converting energy from the sun into electrical current.