Carbon questions for UK media buying agencies on method, boundary and offsets

What to take away

Ask every shortlisted agency for its carbon method, its measurement boundary and the named person who signs off the figures.
Channel mix, creative file weight and the count of ad requests move emissions more than a supplier's green credentials do.
AdGreen covers advertising production. The IPA Media Climate Charter covers media planning and buying. They are separate commitments.
Offsets do not make a campaign carbon neutral, so treat an absolute claim as an evidence question.
Put carbon in the plan as an approval gate and a reporting line, not a page in the credentials deck.

What UK net zero rules mean for a media plan

The government's Net Zero Strategy sets out how the UK intends to reach net zero greenhouse gas emissions by 2050 (Net Zero Strategy: Build Back Greener). It places no direct duty on a media plan.

Media emissions reach most advertisers through their own published climate commitments and through procurement terms, not through a media-specific rule. If your organisation reports value-chain emissions, ask the agency to describe the boundary of its figure. A number without a boundary cannot be checked.

What AdGreen and the IPA Media Climate Charter ask for

AdGreen provides a carbon calculator and training for advertising production. When an agency cites it, ask which version it used and who checked the inputs.

The IPA Media Climate Charter is aimed at media agencies and asks signatories to measure media emissions with a common calculator, then report progress. Signing it is a commitment to measure and reduce, not a certificate of performance.

Production and media are separate footprints, so a low-carbon shoot says little about the plan that carries it. Neither tool covers sponsorships, barter or publisher partnerships, so list what sits outside your measurement before you publish a total.

Where the carbon sits in a media plan

Most of the difference between two plans of the same size comes from what they buy and how heavily the assets are built, not from which supplier hosts the ad. Give each channel a distinct role rather than spreading budget evenly (giving each channel a distinct role).

Carbon source by channel

Channel

Linear TV and BVOD: Device and network energy
Programmatic display and video: Ad requests, data transfer, tags
Out of home: Screen power, lighting, site energy
Audio and podcast: Streaming energy per listening hour
Print and published media: Paper, print and distribution

Main carbon source

Linear TV and BVOD: Which delivery figures, who verified?
Programmatic display and video: How many ad requests per impression?
Out of home: Is site energy metered or estimated?
Audio and podcast: Do you buy the download or stream?
Print and published media: Recycled content, where printed?

Question for the agency

Linear TV and BVOD
Programmatic display and video
Out of home
Audio and podcast
Print and published media

Two plans can carry the same budget and very different emissions, so compare the boundary and the method before the total.

A four-step carbon line in the plan

A four-step carbon line

Set the boundary. Write down what you count, such as media delivery, asset production and screen power, and list what you exclude.
Pin one calculator and version. Use AdGreen for production and the charter calculator for media, and do not mix methods inside a reporting year.
Agree a baseline and a target date. The baseline is your first measured period, and the target is a reduction by a named quarter, reviewed with the budget.
Make carbon a sign-off. The plan does not go live until the owner signs the carbon line beside the budget and the legal checks.

Offsets, claims and contract wording

Buying credits does not remove the emissions a campaign caused, so offsets alone cannot justify a carbon-neutral label. If the creative makes an environmental claim, the CAP Code requires it to be substantiated and not to overstate the benefit (Advertising codes).

Programmatic buying carries a data question too. Cutting the number of partners and tags reduces both data exposure and energy use, and the ICO sets out the UK GDPR expectations for that targeting (UK GDPR guidance).

Put the reporting duty in writing: calculator, version, boundary, reporting date and named owner. Attach it to the scope so it survives the first budget cut (sections to include in an agency RFP).

Common questions

Can a media plan be carbon neutral?

Only against a stated boundary and one calculator. Ask which emissions are counted, which are excluded, and whether offsets are doing the work.

Do UK agencies have to report campaign carbon?

There is no general duty aimed at media plans. Reporting arrives through client climate commitments, listed company disclosure and procurement terms in the contract.

Is AdGreen the same as the IPA Media Climate Charter?

No. AdGreen measures advertising production, while the charter is a media agency commitment to measure and reduce media emissions. An agency can hold one without the other.

What should a buyer ask for in writing?

The calculator and its version, the boundary, a baseline period, a reduction target with a date, and a named owner. Ask for the figure in the same reporting cycle as the media plan.