jm + emissions   11

Food types by CO2 footprint
You want to reduce the carbon footprint of your food? Focus on what you eat, not whether your food is local:
For most foods – and particularly the largest emitters – most GHG emissions result from land use change (shown in green), and from processes at the farm stage (brown). Farm-stage emissions include processes such as the application of fertilizers – both organic (“manure management”) and synthetic; and enteric fermentation (the production of methane in the stomachs of cattle). Combined, land use and farm-stage emissions account for more than 80% of the footprint for most foods.

Transport is a small contributor to emissions. For most food products, it accounts for less than 10%, and it’s much smaller for the largest GHG emitters. In beef from beef herds, it’s 0.5%. Not just transport, but all processes in the supply chain after the food left the farm – processing, transport, retail and packaging – mostly account for a small share of emissions.

Excellent graph from Our World In Data. tl;dr: beef is massively damaging in terms of emissions, poultry is far less, then fish, then various kinds of veg are at the low end. It's shocking how much impact beef has.
co2  food  data  farming  carbon  emissions  climate-change  methane  transport  locavores 
25 days ago by jm
Figure out how to get from A to B with estimates of CO2 emissions involved --

'Ecotrip is a platform that offers a solution to planes’ large CO2 emission by showing routes from user’s origin point to their desired destination, suggesting alternative means of transport ordered by their level of sustainability.'

works great! Pity it's almost impossible to get anywhere from Ireland without flying :(
travel  green  climate-change  co2  emissions  maps  sustainability  via:cat 
6 weeks ago by jm
'Open datasets & methodologies for carbon emissions from different activities. Forked from OpenAMEE, and npm installable'

This is very impressive -- lots of carbon emissions estimation code.
co2  carbon  emissions  estimation  npm  javascript  open-source 
october 2019 by jm
Revealed: the 20 firms behind a third of all carbon emissions
The top 20 companies on the list have contributed to 35% of all energy-related carbon dioxide and methane worldwide, totalling 480bn tonnes of carbon dioxide equivalent (GtCO2e) since 1965.

Those identified range from investor-owned firms – household names such as Chevron, Exxon, BP and Shell – to state-owned companies including Saudi Aramco and Gazprom. Chevron topped the list of the eight investor-owned corporations, followed closely by Exxon, BP and Shell. Together these four global businesses are behind more than 10% of the world’s carbon emissions since 1965.
coal  emissions  business  gas  oil  fossil-fuels  climate-change  co2  carbon  chevron  exxon  bp  shell 
october 2019 by jm
A deconstruction of the BBC's "windmills actually increase global warming" article about SF6 from last week
'This is a neat example of how eminently resolvable challenges around the clean power transition are framed by deniers and ideologues as incurable curses, while actual scientists and engineers just get on with fixing them.'

As Aoife McLysaght notes: 'This is a great, informative thread. Yes SF6 is has a warming effect, but it’s released v little, is a feature of all switches (not only wind turbines as implied), and alternatives are in the works. Wind turbines aren’t zero emissions but they are v low.'
sf6  emissions  wind  electricity  global-warming  climate-change  bbc  bias  science 
september 2019 by jm
CarbonKit provides all the data and models necessary for calculating various greenhouse gas emissions in categories such as car, train and air transport, types of fuel or country-specific grid electricity, electrical appliances, agricultural and industrial processes and building materials.
carbon  co2  emissions  data  ghgs 
august 2019 by jm
Amazon workers call for zero carbon emissions and cancellation of an AWS fossil-fuel friendly program
nice one.
Then the activists saw an article in Gizmodo, a technology news site, that outlined how Amazon’s cloud computing division was building special offerings for oil and gas companies. On its website, Amazon says its customers include BP and Royal Dutch Shell, and its products can “find oil faster,” “recover more oil” and “reduce the cost per barrel.”

In a second meeting with Amazon, the workers raised the oil industry connections with the company’s sustainability team; its members did not seem to be aware of the business, according to several employees at the meeting.

“That really showed us Amazon is not taking climate change seriously if the highest levels of the sustainability team are not even aware that we have an oil and gas business,” said Ms. Cunningham, who was at the meeting.
amazon  aws  fossil-fuels  zero-carbon  emissions  climate-change  sustainability 
april 2019 by jm
Irish agricultural CO2 emissions actually INCREASED by 2.9% last year
Irish EPA: agriculture greenhouse gas emissions increased by 2.9% in 2017 “The most significant drivers are higher dairy cow numbers (+3.1%) which reflects national plans to expand milk production”

Feck's sake.
epa  ireland  co2  greenhouse-gases  emissions  green  farming  agriculture 
december 2018 by jm
How they did it: an analysis of emissions defeat devices in modern automobiles
Using CurveDiff, the team analysed 963 firmware images, for which analysis completed successfully for 924. 406 of the analysed images contained a defeat device, out of which 333 contained at least one active profile. In at least 268 images, the test detection affects the EGR. Firmware images released on Dec 3rd 2014 are used in VW Passat cars, and include the refinement to the defeat device to detect steering wheel angle that we discussed previously.
cars  driving  emissions  diesel  volkswagen  law  regulation  firmware  reverse-engineering 
june 2017 by jm
TV detector vans may have been a con all along
This is shaking my world view -- although I find it more plausible that (as responses to,5753,-22440,00.html claim) they _did_ work until about 10-20 years ago, by detecting RF emissions from the local oscillator inside the TV.

Ross Anderson, at , notes:

During [..] World War II, radio engineering saw advances in radar, passive direction
finding, and low-probability-of-intercept techniques, which I’ll discuss in the next
chapter. By the 1960s, the stray RF leaking from the local oscillator signals in domestic
television sets was being targeted by direction-finding equipment in “TV detector
vans,” in Britain, where TV owners must pay an annual license fee that is supposed to
support public broadcast services. Its use has since expanded to satellite and cable TV
operators, who use detector vans to find pirate decoders. Some people in the computer
security community were also aware that information could leak from cross-coupling
and stray RF (see, for example, [259, 791]).
rf  radio  tv  bbc  tv-licenses  tv-license-detector-vans  security  emissions  tempest 
august 2016 by jm
How VW tricked the EPA's emissions testing system
In July 2015, CARB did some follow up testing and again the cars failed—the scrubber technology was present, but off most of the time. How this happened is pretty neat. Michigan’s Stefanopolou says computer sensors monitored the steering column. Under normal driving conditions, the column oscillates as the driver negotiates turns. But during emissions testing, the wheels of the car move, but the steering wheel doesn’t. That seems to have have been the signal for the “defeat device” to turn the catalytic scrubber up to full power, allowing the car to pass the test. Stefanopolou believes the emissions testing trick that VW used probably isn’t widespread in the automotive industry. Carmakers just don’t have many diesels on the road. And now that number may go down even more.

Depressing stuff -- but at least they think VW's fraud wasn't widespread.
fraud  volkswagen  vw  diesel  emissions  air-quality  epa  carb  catalytic-converters  testing 
september 2015 by jm

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