food and envi Flashcards
poore and nemecek 2019 how much can the impact of the same product vary on the envi
50x
what is best dietry change planet poore and nemecek
-conscious vegan but all vegetarian diets less impact than meat
poore and nemecek how to reduce impact food system planet
-whole supply chain reduce emessions
-retailer reduce waste, scouse low impact, reduce pakaging
-consumer change diet
cripa et al how much green house gas does the food system account for
1/3
cripa et al where does the most emissions producing food come from
farm to gate
cripa et al suggestions improve food system
-decarbonization, energy efficiency
-change production
-work out how to create behavour change
-more monitoring food system
berner-lee et al 2001 what is the amount of emissions one person eats embodied emissions year
2.7 t co2 year
berner lee et al 2011 how may uk GHG emissions come from food?
19%
how much emessions would you save go vegetarian and vegan?
-vegetarian- 22%
-vegan- 26%
springman et al 2018 how much could the impact of the food system on the planet increase by 2050?
50-90%
springman et al 2018 if we change food system how much could we reduce impact on planetary boundaries
3-30%
springman 2018 by 2050 how much food water cross blue water boundary
50%
springman 2018 how not cross
-cc
-cropland and blue water
-nitrogen-phos boundary
-cc= dietry change
-cropland/bluewater= tech and management close yield gap and increase water efficiency
-nit/phos- combo above and reduce food waste
springman how to change food system 2018
-regulation
-incentives to farmers
-invest education
-whole supply chain
-incentives dietary change- media, fiscal school work
how many GT C02 equivalent year food system create
18
how much GHG emission come agriculture and land use change
71%
how much emission associated meat
1/2
how much global fresh water food use
70%
how to calculate C02 equivalent
warming potential x tonnes gas
whats embodied emessions
all different scources of emissions in the production
how much more warming potential does methane have to Co2
x28
time scale impact methane
-large impact short term less impact long term
why lots abilty to reduce impact food system
impacts of products vary so much = can change how produce what eat to lowewr impact
why out of season asparagus bad
-grown in dry part peru water intensive and plane
