topic 10 - using resources (6. life cycle assessments) Flashcards Preview

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Flashcards in topic 10 - using resources (6. life cycle assessments) Deck (10)
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1
Q

what are life cycle assessments

A

they access the environmental impact of the entire lifetime of a product

2
Q

what are the stages of the lifetime of a product

A

getting raw materials
manufacturing and packaging
using product
product disposal

3
Q

what factors must be considered at each stage of the LCAs

A
amount of energy needed
amount of water used
pollution produced
waste formed
how waste disposed
how long product used for
4
Q

how can getting raw materials damage environment

A

extraction
transportation
processing

5
Q

how can extraction damage the environment

A

mining

result in pollution due to energy needed

6
Q

how can transportation damage environment

A

greenhouse emissions from combustion of fossil fuels

7
Q

how can processing damage environment

A

often large amounts of waste with processes that need to be deposed of

8
Q

how can manufacturing and packaging damage the environment

A

pollution
use lots of energy resources
chemical reactions produce waste products

9
Q

how can product disposal damage the environment

A

transport to landfill- pollutants and energy released to atmosphere
landfill- pollutes water and land
incineration (waste burnt at very high temperatures)- air pollutions

10
Q

problems involved with life cycle assessments

A

effect of pollutants is hard to value

can be biased as it takes into account the values of the person carrying out the assessment

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