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Export your carbon footprint

You can export your Carbon Footprint data to BigQuery in order to perform data analysis, or to create custom dashboards and reports.

The Carbon Footprint export captures gross estimated greenhouse gas emissions associated with the usage of covered Google Cloud services for the selected billing account.

After configuring an export, you are charged for the BigQuery resources used to store and query the exported data.

Before you begin

To create a Carbon Footprint export, we recommend having the following IAM roles:

More precisely, you must have the following IAM permissions on the Google Cloud project:

  • resourcemanager.projects.update
  • serviceusage.services.enable
  • bigquery.transfers.update

And the following IAM permission on the billing account:

  • billing.accounts.getCarbonInformation

If using VPC Service Controls

If your organization is using VPC Service Controls, an ingress rule needs to be defined for the BigQuery API and BigQuery Data Transfer Service API.

For your Ingress policy rule:

  • Set the source in the 'From' section to 'All sources allow'.
  • Grant permission to the identity, els-da-carbon@gcp-carbon-footprint-exports.iam.gserviceaccount.com.

Configuring a Carbon Footprint export to BigQuery

Carbon Footprint data is exported via the BigQuery Data Transfer Service. The data transfer creates a monthly partitioned table called carbon_footprint in the BigQuery dataset of your choice.

Carbon Footprint exports each month's data on the 15th day of the following month. For example, carbon data for September 2022 will be exported on October 15, 2022.

Once a Carbon Footprint transfer config has been created, it will automatically export future carbon reports on the 15th of every month. You will also be able to run a backfill to request historical data back to January 2021.

Console

Take the following steps to initiate the export:

  1. Go to Carbon Footprint
  2. Select the Cloud Billing account you want to export from the Billing account menu.
  3. Click Export to enable the BigQuery Data Transfer Service and open the BigQuery Data Transfer Service page.
  4. On the BigQuery Data Transfer Service page:
    1. Ensure that Source is set to "Google Cloud Carbon Footprint Exports".
    2. In Transfer config name, enter a display name.
    3. In Destination settings, click the Dataset ID field and then select Create new dataset if you want to create a new BigQuery dataset to host the exported table; alternatively select an existing BigQuery dataset.
    4. In Data source details, confirm the Cloud Billing account ID to export. Optionally, add additional account IDs as a comma separated list. All billing account IDs should be in the format XXXXXX-XXXXXX-XXXXXX.
  5. Click Save.
  6. In the access request window, click Allow.

bq

Use the bq mk --transfer_config command to initiate the export:

bq mk \
--transfer_config \
--target_dataset=DATASET \
--display_name=NAME \
--params='{"billing_accounts":"BILLING_ACCOUNT_IDS"}' \
--data_source='61cede5a-0000-2440-ad42-883d24f8f7b8'

Where:

  • DATASET is the target dataset for the transfer configuration.
  • NAME is the display name for the transfer configuration. For example: "Company Carbon Report".
  • BILLING_ACCOUNT_IDS is your billing account ID or a comma-separated list of billing account IDs. For example: XXXXXX-XXXXXX-XXXXXX,XXXXXX-XXXXXX-XXXXXX

Terraform

Use the bigquery_data_transfer_config Terraform resource to create an export:

resource "google_bigquery_data_transfer_config" "RESOURCE_NAME" {
  display_name           = "NAME"
  data_source_id         = "61cede5a-0000-2440-ad42-883d24f8f7b8"
  destination_dataset_id = google_bigquery_dataset.DATASET.dataset_id
  params = {
    billing_accounts     = "BILLING_ACCOUNT_IDS"
  }
}

Where:

  • RESOURCE_NAME is the name of the Terraform resource. For example: carbon_export.
  • NAME is the display name for the transfer configuration. For example: "Company Carbon Report".
  • DATASET is the name of the google_bigquery_dataset Terraform resource to use as the target dataset for the export.

  • BILLING_ACCOUNT_IDS is your billing account ID or a comma-separated list of billing account IDs. For example: XXXXXX-XXXXXX-XXXXXX,XXXXXX-XXXXXX-XXXXXX

The transfer config has now been created and will export data on the 15th of every future month.

The transfer config does not automatically export historical data. To request historical data back to January 2021, schedule a data backfill using the following steps.

Console

Take the following steps to schedule the data backfill:

  1. Go to the details of the transfer you just created.
  2. Click Schedule Backfill.
  3. Select Run for a date range.
  4. Select February 15, 2021 as the start date and today's date as the end date. Note that the export for February 15, 2021 contains the January 2021 data and is therefore the earliest month available to request.
  5. Click OK to request the data backfill.

Data backfills will be created for the selected range, exporting historical monthly data to the destination dataset.

bq

Use the bq mk --transfer_run command to create a backfill:

bq mk \
--transfer_run \
--start_time=START_TIME \
--end_time=END_TIME \
CONFIG

Where:

  • START_TIME is a timestamp that specifies the start time of the range to backfill. For example: 2021-02-15T00:00:00Z. Note that February 15, 2021 is the earliest date you can specify here, as it contains the January 2021 data.
  • END_TIME is a timestamp that specifies the end time of the range to backfill. For example: 2022-09-15T00:00:00Z. You can use the current date.
  • TRANSFER_CONFIG is the identifier of the transfer created in the previous step. For example: projects/0000000000000/locations/us/transferConfigs/00000000-0000-0000-0000-000000000000.

Once the data is exported, you can use BigQuery to view and query the data. Read more about the data schema.

You can share the exported data to others in your organization by granting them the BigQuery User IAM role on the project selected earlier. Alternatively, you can grant fine-grained access at the dataset or table level using the BigQuery Data Viewer IAM role.

Managing Carbon Footprint exports

You can manage your Carbon Footprint exports through the BigQuery Data Transfer Service. Learn more about Working with transfers.

Exporting to Sheets or CSV

After you've configured your carbon footprint export to BigQuery and the scheduled export has completed, you can export that data from BigQuery to Sheets or CSV.

  1. Go to BigQuery
  2. In the Explorer panel, expand your project and dataset, then select the table that contains the exported carbon footprint data.
  3. Click Query.
  4. Enter a query to return the data you want to export. See below for an example.
  5. After the query has run, under Query results, click Save results.
  6. Select the desired format and click Save.

The following query lets you save the entire contents of the exported table:

SELECT
  usage_month,
  billing_account_id,
  project.number AS project_number,
  project.id AS project_id,
  service.id AS service_id,
  service.description AS service_description,
  location.location AS location,
  location.region AS region,
  carbon_model_version,
  carbon_footprint_kgCO2e.scope1 AS carbon_footprint_scope1,
  carbon_footprint_kgCO2e.scope2.location_based AS carbon_footprint_scope2_location_based,
  carbon_footprint_kgCO2e.scope3 AS carbon_footprint_scope3,
  carbon_footprint_total_kgCO2e.location_based AS carbon_footprint_total_location_based
FROM
  `PROJECT.DATASET.carbon_footprint`
ORDER BY
  usage_month DESC,
  carbon_footprint_total_location_based DESC

What's next?