Detailed walkthrough of calculations
Entity Definitions
Channels
| Channel | Description |
|---|
web | Website that is not primarily social or CTV |
app | Mobile app that is not primarily social or CTV |
social | A social platform (Snapchat, Facebook, etc) |
ctv-bvod | A TV-like streaming platform |
streaming-video | Website or app with online video content |
audio | Audio content (podcasts, streaming music) |
dooh | Digital out of home - billboards, transit, etc |
Device Types
| Device type | Description |
|---|
phone | A phone |
tablet | A tablet |
pc | A pc with a monitor or a laptop |
tv | A TV |
smart-speaker | A smart speaker - Amazon Echo or equivalent |
Network Types
| Network type | Description |
|---|
mobile | A mobile network (3G/4G/5G) |
fixed | A fixed network (broadband) |
Video Player
| Field | Description |
|---|
size_bytes | Size of the javascript/html for a video player if present |
buffering_seconds | Video player buffering - if player preloads content, leave blank |
download_trigger | What starts the content download - impression, view (ie lazy load), play |
| Field | Description |
|---|
rendered_width_pixels | Width of the creative when rendered. Leave blank for responsive (will assume screen width) |
rendered_height_pixels | Height of the creative when rendered. Leave blank for responsive (will assume screen height) |
image_sizes | Array of image dimensions (eg ["300x250", "70x70"]) |
audio_duration_seconds | Audio duration (if applicable) |
video_duration_seconds | Video duration (if applicable) |
video_player | Video player used to render video (if applicable) |
other_assets_bytes | Metadata, text, html, etc |
ad_platforms | Ad serving, verification, and measurement ad platforms wrapping or embedded in the ad format |
300x250 programmatic banner
image_sizes = ['300x250']
rendered_width_pixels = 300,
rendered_height_pixels = 250
30 second audio inserted into a podcast
audio_duration_seconds = 30
15 second outstream video
video_duration_seconds = 15;
video_player = 'default',
rendered_width_pixels = 500,
rendered_height_pixels = 400
Native product carousel
image_sizes = ['400x400','400x400','400x400'],
other_assets_bytes = 7321,
rendered_height_pixels = 600,
rendered_width_pixels = 450
Property
| Field | Description |
|---|
channels | The channel(s) of this property |
average_seconds_per_session_excluding_ads | The average length of a session on this property excluding ads (eg 44 min of a 60 min TV show) |
average_imps_per_session | The average number of impressions per session |
average_data_kb_per_session_excluding_ads | The average number of KB transferred during a session excluding ads |
video_bitrate_kbps | The average bitrate for a CTV-BVOD property (e.g. 4200 kbps) |
ad_funded_percentage | 0-100 The percentage of content funded by advertising (eg 50) |
allocated_adjusted_corporate_emissions_kgco2e | This property’s share of corporate emissions |
total_sessions | Number of sessions in the same time period as corporate emissions |
organization_model_quality | Parent organization model quality (1-5) |
model_quality | Model quality (1-5) |
| Field | Description |
|---|
emissions_per_creative_request_per_geo_gco2_per_imp | Adjusted, allocated emissions per creative request by continent (NAMER, LATAM, EMEA, JAPAC) |
emissions_per_bid_request_per_geo_gco2_per_imp | Adjusted, allocated emissions per bid request by continent (NAMER, LATAM, EMEA, JAPAC) |
emissions_per_rtdp_request_per_geo_gco2_per_imp | Adjusted, allocated emissions per rtdp request by continent (NAMER, LATAM, EMEA, JAPAC) |
bidders | Array of ad platforms that are sent bid requests |
real_time_data_providers | Array of ad platforms that are sent real-time data requests (not propagated) |
distribution_rate_by_bidder_by_country | Traffic shaping data for each bidder by country (eg 'xandr.com', 'US', 0.58) |
average_bid_request_size | Average size of a client-side bid request |
sends_client_side_requests | Does this platform send client-side bid requests (eg prebid client) |
model_quality | Model quality (1-5) |
Placement
| Field | Description |
|---|
ad_platforms | The ad platforms called by this placement |
Delivery Row
| Field | Description |
|---|
impressions | The number of impressions counted (required for all channels other than DOOH) |
views | The number of views counted |
plays | The number of plays (required for DOOH) |
utc_datetime | Date and time, in UTC, when impressions were delivered |
country | The country where the impression was delivered |
region | The region of the country where the impression was delivered |
channel | See channels |
device_type | See device types |
network_type | See network types |
property | See property |
creative_ad_format | Either a basic or vendor-provided ad format |
creative_ad_platforms | Ad serving, verification, and measurement ad platforms wrapping or embedded in the creative |
creative_total_image_data_transfer_bytes | Total bytes for the data transfer for the image itself for all impressions, ideally measured by the CDN |
creative_image_sizes | Array of image sizes included in the creative |
creative_total_audio_data_transfer_bytes | Total bytes for the data transfer for the core audio asset for all impressions, ideally measured by the CDN |
creative_audio_duration_seconds | Average audio duration in seconds for a single impression |
creative_total_video_data_transfer_bytes | Total bytes for the data transfer for the core video asset for all loads, ideally measured by the CDN |
creative_video_vast_bytes | Average size of VAST/VPAID wrapper for the video in bytes for a single load |
creative_video_bitrate_kbps | Video bitrate as delivered in kilobits per second |
creative_video_size_bytes | Average video size as delivered in bytes for a single load |
creative_video_duration_seconds | Video duration in seconds |
creative_video_view_time_seconds | Average time, in seconds, that a video is viewed |
creative_video_view_rate | Average percentage of a video that is viewed |
creative_time_in_view_seconds | Time that the creative was visible on the device |
creative_is_3p_served | Is the ad format served by a third party ad server |
Defaults
Conventional model data transfer by network type
From SRIxAD database 2.1, original source ADEME_220830_v1.4
default_usage_kwh_per_gb:
scope3:
fixed: 0.03
mobile: 0.14
sri:
fixed: 0.0687
mobile: 0.236
default_network_embodied_emissions_gco2e_per_kb:
scope3:
fixed: 0.00000443
mobile: 0.00000797
sri:
fixed: 0.00000443
mobile: 0.00000797
Power model data transfer by network type
From Carbon impact of video streaming (Carbon Trust), Table 5; and calculated here
default_baseload_watts:
fixed: 9.55
mobile: 1.2
default_dynamic_watts_per_mbps:
fixed: 0.030
mobile: 1.53
Mobile to fixed ratios by country
From ITU Data Hub (2022 data)
default_percent_mobile:
scope3: 23.6
sri: 10.0
default_percent_mobile_by_country:
scope3:
ZA: 30.945
AO: 59.384
AL: 15.375
DZ: 27.683
AD: 1.624
AM: 8.904
SA: 55.143
AU: 11.427
AT: 38.885
AZ: 29.787
BR: 11.294
BS: 25.756
BE: 4.46
BJ: 99.73
BD: 34.15
BH: 46.29
BY: 22.182
BW: 42.206
BT: 99.456
BG: 9.644
CA: 2.685
CL: 16.549
CN: 15.037
CO: 55.086
LK: 63.568
CM: 23.455
KM: 99.676
CV: 26.441
CI: 52.974
CR: 8.896
CU: 63.572
CY: 7.472
DE: 5.257
DJ: 36.67
DK: 12.428
ES: 9.105
EG: 14.608
EC: 9.798
ET: 45.337
FI: 48.403
GB: 5.12
GH: 83.523
GQ: 99.999
GR: 9.203
HK: 11.514
HN: 51.493
HU: 13.125
HR: 23.663
IT: 17.54
IN: 70.092
ID: 25.742
IE: 14.068
IR: 67.887
IQ: 1.815
IS: 14.286
JP: 15.825
JM: 2.789
JO: 35.178
KE: 36.757
KR: 9.753
KW: 87.288
LI: 1.625
LS: 68.523
LV: 31.858
MU: 11.724
MC: 9.054
MG: 45.951
MX: 6.249
MY: 45.208
MV: 6.198
MN: 39.596
MA: 36.417
MW: 98.678
NI: 48.681
NG: 99.252
NZ: 3.535
PF: 17.987
OM: 15.759
PK: 59.667
PL: 11.498
PT: 6.065
QA: 18.195
RO: 10.538
RW: 33.068
RU: 27.984
SN: 61.616
SC: 22.059
SM: 7.767
ST: 11.867
CH: 17.121
SI: 4.378
CZ: 6.277
TG: 17.266
TH: 33.423
TT: 6.831
TN: 15.891
TR: 18.092
TZ: 98.33
AE: 8.167
UG: 93.327
UY: 13.111
UZ: 32.197
VE: 7.724
VN: 11.054
VU: 80.578
YE: 11.392
RS: 16.372
ZW: 33.026
GE: 10.404
KZ: 42.651
KG: 74.85
SK: 10.929
MK: 9.11
TW: 30.249
ME: 16.701
US: 5.0
FR: 10.0
Video player characteristics
Based on actual data transfer of https://vjs.zencdn.net/8.10.0/video.min.js on February 23, 2024
default_video_player_size_bytes: 192205
default_video_player_download_trigger:
web: 'impression'
app: 'impression'
ctv-bvod: 'impression'
streaming-video: 'impression'
dooh: 'play'
social: 'impression'
Based on YouTube recommendations, Wikipedia
default_image_compression_ratio: 10
default_non_primary_video_bitrate_kbps: 1200
default_video_bitrate_kbps:
phone: 800
tablet: 1000
pc: 1200
tv: 3690
default_audio_bitrate_kbps:
phone: 160
tablet: 160
pc: 160
tv: 160
smart-speaker: 160
Device size
From common devices (Quad HD 27” monitor, iPhone 13, Nexus 5X, iPad Air 1/2, iPad 2/3, Nexus 9, 1080P TV)
default_device_width:
phone: 1080
tablet: 1536
pc: 2560
tv: 1920
default_device_height:
phone: 1920
tablet: 2048
pc: 1440
tv: 1080
Device energy use and embodied emissions
See Consumer Devices
default_device_watts:
scope3:
phone: 0.77
pc: 53.2
tablet: 3.0
tv: 87.4
smart-speaker: 2.5
sri:
phone: 2.856
pc: 29.4
tablet: 29.4
tv: 81.6
default_device_embodied_emissions_per_second:
scope3:
phone: 0.0058
pc: 0.007
tablet: 0.0029
tv: 0.0096
smart-speaker: 0.0061
sri:
phone: 0.00946
pc: 0.0132
tablet: 0.0128
tv: 0.00889
Time in view for non-video ads
Observations from various channels
default_time_in_view_seconds: 6
Observations from various channels
default_consumer_device_request_size_bytes:
web: 1500
app: 1000
ctv-bvod: 0
dooh: 0
audio: 1000
social: 1000
streaming-video: 1000
default_emissions_per_creative_request_gco2_per_imp: 0.0003
default_emissions_per_bid_request_gco2_per_imp: 0.11442
default_emissions_per_rtdp_request_gco2_per_imp: 0.01
default_emissions_generic_ad_server_gco2_per_imp: 0.000016
default_emissions_generic_ad_server_gco2_per_imp_by_channel:
social: 0.0043
generic_creative_ad_server:
emissions_per_creative_request_per_geo_gco2_per_imp:
NAMER: 0.0001
EMEA: 0.0001
JAPAC: 0.0003
LATAM: 0.0001
generic_measurement_platform:
emissions_per_creative_request_per_geo_gco2_per_imp:
NAMER: 0.0001
EMEA: 0.0001
JAPAC: 0.0003
LATAM: 0.0001
Channel and device type mappings
default_channel_by_device:
phone:
- social
- ctv-bvod
- audio
- app
- web
- streaming-video
tablet:
- social
- ctv-bvod
- audio
- app
- web
- streaming-video
pc:
- ctv-bvod
- social
- audio
- web
- streaming-video
tv:
- ctv-bvod
- social
- audio
- app
- streaming-video
smart-speaker:
- audio
default_device_by_channel:
social: phone
ctv-bvod: tv
streaming-video: pc
audio: phone
app: phone
web: pc
default_platform_ad_format_identifier_by_channel:
dooh: landscape-dooh
social: 1080-1920-sponsored-post-social-phone
ctv-bvod: 15s-video-ctv-bvod-tv
streaming-video: 15s-video-streaming-video-pc
audio: 30s-audio-digital-audio-phone
app: interstitial-app-phone
web: leaderboard-web-pc
default_platform_ad_format_by_channel:
dooh: Landscape - 1920x1080 Image
social: Sponsored Post - 1080x1920 Image
ctv-bvod: 15s Video
streaming-video: 15s Video
audio: 30s Audio
app: Interstitial - 1080x1920 Banner
web: Leaderboard - 728x90 Banner
default_property_average_imps_per_session_by_channel:
social: 24
ctv-bvod: 8.256
streaming-video: 1
audio: 4.8
app: 14
web: 32
default_property_ad_funded_percentage_by_channel:
dooh: 100
social: 100
ctv-bvod: 100
streaming-video: 100
audio: 100
app: 100
web: 100
default_average_seconds_per_session_excluding_ads_by_channel:
social: 240
ctv-bvod: 2580
streaming-video: 300
audio: 1500
app: 140
web: 320
default_average_data_kb_per_session_seconds_excluding_ads_by_channel:
social: 38
app: 29.5
web: 1.011
default_property_g_per_imp_by_channel:
dooh: 0.049
social: 0.15
streaming-video: 0.049
ctv-bvod: 0.280
audio: 0.049
app: 0.049
web: 0.049
Water consumption by country and grid region
us_grid_subregion_l_h20_per_kwh:
akgd: 3.42
akms: 15.37
aznm: 4.97
camx: 5.19
erct: 1.27
frcc: 1.49
hims: 2.40
hioa: 1.45
mroe: 3.06
mrow: 3.10
newe: 4.11
nwpp: 9.48
nycw: 1.85
nyli: 1.63
nyup: 8.08
rfce: 2.31
rfcm: 2.51
rfcw: 2.22
rmpa: 2.58
spno: 1.73
spso: 2.03
srmv: 2.24
srmw: 2.67
srso: 2.29
srtv: 3.64
srvc: 2.37
country_l_h20_per_kwh:
AR: 11.45
AU: 4.73
AT: 5.72
BE: 2.62
BR: 18.60
BG: 4.62
CA: 8.17
CL: 10.52
CN: 6.01
CY: 1.29
CZ: 3.21
DK: 3.19
EE: 2.20
FI: 4.53
FR: 3.67
DE: 1.95
GB: 2.33
GR: 5.14
HU: 3.69
IS: 6.14
IN: 3.44
ID: 2.26
IE: 1.48
IT: 4.84
JP: 2.31
LV: 2.55
LT: 5.90
LU: 12.78
MY: 1.68
MT: 1.12
MX: 5.30
NL: 3.43
NZ: 14.97
NO: 6.66
PL: 2.51
PT: 9.59
RO: 7.36
RU: 3.46
SK: 5.79
SI: 2.98
KR: 1.89
ES: 6.21
SE: 6.03
CH: 5.66
TW: 1.49
TH: 2.89
TR: 4.92
UA: 2.13
US: 3.13
Lookups from external sources
Carbon intensity by country, region, and UTC Date/Time
Providers should clearly and publicly document:
- Which data provider is used for carbon intensity data (for instance, WattTime or ElectricityMaps)
- What carbon intensity metric is used (marginal vs average)
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime) should look up the carbon intensity in gCO2e based on 100-year global warming potential (GWP100) from a database at no less than hourly granularity.
lookup_carbon_intensity_quality(country, region) should return the quality of the underlying grid mix data on a scale of 1-5 per Model Quality
Fallbacks
We use all data we have available on every single request but in many situations we may lack some information, for this
we have a series of fallbacks to be able to provide reasonable estimates in most situations.
To determine network when it’s not submitted we calculate costs associated to network type
as a weighted average of the fixed and mobile usage in the country (if available) or worldwide.
We can also generally determine the channel from the property or when that is ambiguous but we have device information
we fall back to a default channel by device.
pct_mobile =
country ?
default_percent_mobile_by_country[country] / 100 :
default_percent_mobile / 100
average_embodied_emissions_gco2e_per_kb =
default_network_embodied_emissions_gco2e_per_kb['mobile'] x pct_mobile +
default_network_embodied_emissions_gco2e_per_kb['fixed'] x (1 - pct_mobile)
embodied_emissions_gco2e_per_kb =
network_type ?
default_network_embodied_emissions_gco2e_per_kb[network_type] :
average_embodied_emissions_gco2e_per_kb
average_usage_kwh_per_gb =
default_usage_kwh_per_gb['mobile'] x pct_mobile +
default_usage_kwh_per_gb['fixed'] x (1 - pct_mobile)
usage_kwh_per_gb =
network_type ?
default_usage_kwh_per_gb['network_type'] :
average_usage_kwh_per_gb
average_baseload_watts =
default_baseload_watts['mobile'] x pct_mobile +
default_baseload_watts['fixed'] x (1 - pct_mobile)
average_dynamic_watts_per_mbps =
default_dynamic_watts_per_mbps['mobile'] x pct_mobile +
default_dynamic_watts_per_mbps['fixed'] x (1 - pct_mobile)
baseload_watts =
network_type ?
default_baseload_watts[network_type] :
average_baseload_watts
dynamic_watts_per_mbps =
network_type ?
default_dynamic_watts_per_mbps[network_type] :
average_dynamic_watts_per_mbps
lookup_channel:
if property.channels.length == 1:
return property.channels[0]
if channel && channel in property.channels:
return channel
is_audio_creative =
creative_audio_data_transfer_bytes ||
creative_audio_duration_seconds ||
ad_format.audio_duration_seconds
if is_audio_creative && 'audio' in property.channels:
return 'audio'
if device_type && default_channel_by_device[device_type] in property.channels:
return default_channel_by_device[device_type]
return property.channels[0]
channel = lookup_channel()
device_type = device_type ? default_device_by_channel[channel]
Calculating Emissions
Creative Delivery - Data Transfer
creative_data_transfer_emissions_gco2_per_imp =
creative_data_transfer_usage_emissions_gco2_per_imp +
creative_data_transfer_embodied_emissions_gco2_per_imp
For all channels other than CTV/BVOD, use the conventional model:
creative_data_transfer_bytes =
video_bytes +
audio_bytes +
image_bytes +
ad_format.video_player.size_bytes +
ad_format.other_asset_bytes
creative_data_transfer_usage_emissions_gco2 =
creative_data_transfer_bytes / 1000 x
usage_kwh_per_gb / 1000000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
creative_data_transfer_embodied_emissions_gco2 =
creative_data_transfer_bytes / 1000 x
embodied_emissions_gco2e_per_kb
If data transfer is provided in the delivery row, use it:
image_bytes = creative_total_image_data_transfer_bytes
video_bytes = creative_total_video_data_transfer_bytes + (creative_video_vast_bytes x loads)
audio_bytes = creative_total_audio_data_transfer_bytes
Otherwise, calculate data transfer:
image_sizes = creative_image_sizes ? ad_format.image_sizes
image_bytes = SUM(image_sizes[n].width x image_sizes[n].height) x 3 / default_image_compression_ratio x impressions
audio_duration = creative_audio_duration_seconds ?? ad_format.audio_duration_seconds
audio_bytes = audio_duration_seconds x default_audio_bitrate_kbps[device_type] / 8 x 1000 x impressions
is_primary_experience = !ad_format.rendered_width_pixels && !ad_format.rendered_height_pixels
default_bitrate_kbps =
is_primary_experience ?
default_video_bitrate_kbps[device_type] :
default_non_primary_video_bitrate_kbps
video_bitrate_kbps =
creative_video_bitrate_kbps ??
creative_video_size_bytes x 8 / 1000 / creative_video_duration ??
property.video_bitrate_kbps[device_type] ??
default_bitrate_kbps
video_duration = creative_video_duration_seconds ?? ad_format.video_duration_seconds
seconds_watched = creative_video_view_time_seconds ??
creative_video_view_rate x video_duration_seconds ??
video_duration_seconds
buffer = ad_format.video_player.buffering_seconds ?? infinity
seconds_streamed = MIN(seconds_watched + buffer, video_duration_seconds)
loads = switch(ad_format.video_player.download_trigger):
'view': views
'play': plays
'impression': impressions
video_bytes = (video_bitrate_kbps / 8 x 1000 x seconds_streamed + creative_video_vast_bytes) x loads
For CTV/BVOD, use the power model:
video_bitrate_kbps =
creative_video_bitrate_kbps ??
property.video_bitrate_kbps[device_type] ??
default_video_bitrate_kbps[device_type]
power_watts =
baseload_watts +
dynamic_watts_per_mbps x video_bitrate_kbps / 1000
creative_data_transfer_usage_emissions_gco2_per_imp =
creative_video_duration_seconds / 3600 x
power_watts / 1000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
creative_data_transfer_embodied_emissions_gco2_per_imp =
creative_video_duration_seconds x
video_bitrate_kbps / 128 x
embodied_emissions_gco2e_per_kb
default_creative_platforms =
creative_is_3p_served ?
[generic_creative_ad_server, generic_measurement_platform] :
[]
creative_platforms = creative_ad_platforms ?? default_creative_platforms
creative_platform_emissions_gco2_per_imp = 0
for platform in [creative_platforms, ad_format.ad_platforms]:
creative_platform_emissions_gco2_per_imp += platform.emissions_per_creative_request_per_geo_gco2_per_imp
Creative Delivery - Consumer Device
audio_device_coverage =
device_type == 'smart-speaker' ? 1 : 0
audio_device_coverage_seconds =
audio_device_coverage x
audio_duration
device_pixels = default_device_width[device_type] x default_device_height[device_type]
rendered_width = ad_format.rendered_width_pixels ?? default_device_width[device_type]
rendered_height = ad_format.rendered_height_pixels ?? default_device_height[device_type]
visual_device_coverage =
is_primary_experience ?
1 :
MIN(1, rendered_width x rendered_height / device_pixels)
time_in_view =
video_duration ??
creative_time_in_view_seconds ??
default_time_in_view_seconds
device_coverage_seconds =
audio_duration ?
audio_device_coverage_seconds :
visual_device_coverage x time_in_view
creative_consumer_device_usage_emissions_gco2_per_imp =
device_coverage_seconds / 3600 x
default_device_watts[device_type] / 1000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
creative_consumer_device_embodied_emissions_gco2_per_imp =
device_coverage_seconds x
default_device_embodied_emissions_per_second[device_type]
media_data_transfer_emissions_gco2_per_imp =
media_data_transfer_usage_emissions_gco2_per_imp +
media_data_transfer_embodied_emissions_gco2_per_imp
Determing the session seconds for a single impressions
session_seconds_per_imp =
property.average_seconds_per_session_excluding_ads x
property.ad_funded_percentage/100 /
property.average_imps_per_session
For all channels other than CTV/BVOD, use the conventional model:
media_data_transfer_kb_per_imp =
property.average_data_kb_per_session_excluding_ads x
property.ad_funded_percentage/100 /
property.average_imps_per_session
media_data_transfer_usage_emissions_gco2_per_imp =
media_data_transfer_kb_per_imp x
usage_kwh_per_gb / 1000000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
media_data_transfer_embodied_emissions_gco2_per_imp =
media_data_transfer_kb_per_imp x
embodied_emissions_gco2e_per_kb
For CTV/BVOD, use the power model:
video_bitrate_kbps = property.video_bitrate_kbps[device_type] ?? default_video_bitrate_kbps[device_type]
power_watts =
baseload_watts +
dynamic_watts_per_mbps x video_bitrate_kbps / 1000
media_data_transfer_usage_emissions_gco2_per_imp =
session_seconds_per_imp / 3600 x
power_watts / 1000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
media_data_transfer_embodied_emissions_gco2_per_imp =
session_seconds_per_imp x
video_bitrate_kbps / 128 x
embodied_emissions_gco2e_per_kb
media_consumer_device_usage_emissions_gco2_per_imp =
session_seconds_per_imp / 3600 x
default_device_watts[device_type] / 1000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
media_consumer_device_embodied_emissions_gco2_per_imp =
session_seconds_per_imp x
default_device_embodied_emissions_per_second[device_type]
media_corporate_emissions_gco2_per_imp =
property.allocated_adjusted_corporate_emissions_kg x 1000 /
property.total_sessions /
property.average_imps_per_session
get_platform_emissions(ad_platform):
direct_emissions = emissions_per_bid_request_per_geo_gco2_per_imp
rtdp_emissions = 0
for rtdp in ad_platform.real_time_data_providers:
rtdp_emissions += emissions_per_rtdp_request_per_geo_gco2_per_imp
bidder_emissions = 0
for bidder in ad_platform.bidders:
bidder_emissions += get_platform_emissions(bidder) x
ad_platform.distribution_rate_by_bidder_by_country[country, bidder] ?? 1
return direct_emissions + rtdp_emissions + bidder_emissions
ad_selection_platform_emissions_gco2_per_imp = 0
data_transfer_bytes = 0
for platform in placement.ad_platforms:
ad_selection_platform_emissions_gco2_per_imp += get_platform_emissions(platform)
platform_bytes =
platform.average_bid_request_size ??
default_consumer_device_request_size_bytes[channel]
data_transfer_bytes += default_consumer_device_request_size_bytes[channel]
if platform.sends_client_side_requests:
for bidder in platform.bidders:
bidder_bytes =
bidder.average_bid_request_size ??
default_consumer_device_request_size_bytes[channel]
data_transfer_bytes +=
bidder_bytes x
platform.distribution_rate_by_bidder_by_country[country, bidder] ?? 1
Ad Selection - Data Transfer
ad_selection_data_transfer_usage_emissions_gco2_per_imp =
data_transfer_bytes / 1000 x
usage_kwh_per_gb / 1000000 x
lookup_carbon_intensity_gco2e_per_kwh(country, region, utc_datetime)
ad_selection_data_transfer_embodied_emissions_gco2_per_imp =
data_transfer_bytes / 1000 x
embodied_emissions_gco2e_per_kb
ad_selection_data_transfer_emissions_gco2_per_imp =
ad_selection_data_transfer_usage_emissions_gco2_per_imp +
ad_selection_data_transfer_embodied_emissions_gco2_per_imp
Model Quality
grid_mix_model_quality = lookup_carbon_intensity_quality(country, region)
organization_model_quality = property.organization_model_quality
property_model_quality = property.model_quality
total_platforms = 0
modeled_platforms = 0
for platform in placement.ad_platforms:
total_platforms++
if platform.model_quality > 1
modeled_platforms++
# Model one level of downstream platforms
for bidder in ad_platform.bidders:
total_platforms++
if bidder.model_quality > 1
modeled_platforms++
ad_platform_modeled_ratio = modeled_platforms / total_platforms
