Start with a carbon map, not a net-zero slogan

Science-based targets are designed to align a company’s emissions reductions with climate science rather than internal guesswork or marketing timelines.[3] For companies just starting sustainability planning, the useful shift is treating this less like branding and more like systems design.

The first practical step is building a reasonably accurate emissions inventory across Scope 1, 2, and 3 emissions.[3] That sounds intimidating, but most organizations already hold fragments of the needed data inside finance systems, procurement records, utility bills, travel reporting, and supplier contracts.

A recurring mistake is trying to calculate everything perfectly before making any commitments. Most guidance now encourages companies to start with material emissions sources first and improve data quality over time.[2][6]

Manufacturers, for example, often discover that purchased materials and supply-chain activity dominate their footprint more than factory electricity alone.[2] For office-heavy companies, business travel, cloud infrastructure, commuting, and purchased services can matter more than expected.[4]

Sector guidance matters more than generic advice

One interesting evolution in the Science Based Targets initiative ecosystem is the growing amount of sector-specific guidance. The rules are no longer entirely one-size-fits-all.

Power companies now have dedicated implementation resources, including a Quick Start Guide for Electric Utilities.[1] Chemical companies have sector pathways and implementation criteria that define expected emissions reductions aligned with global climate goals.[5]

That matters because decarbonization constraints are very different across sectors. A software company can often reduce operational emissions relatively quickly through procurement and infrastructure choices. Heavy industry faces slower replacement cycles, process emissions, and supply-chain dependencies that require different pathways.[5]

A practical takeaway for smaller teams: use the most specific sector guidance available before building an internal roadmap from scratch.[1][5]

The hardest part is usually Scope 3

Many early sustainability plans focus on electricity use because it is measurable and relatively easy to influence. But Scope 3 emissions — suppliers, logistics, product use, employee travel, procurement — are often the largest category.[4]

This is also where sustainability planning starts resembling product management. You rarely control the entire system directly. You influence it through purchasing decisions, standards, incentives, and communication.

Normative’s guidance highlights supplier emissions and business travel policies as core pieces of a credible reduction plan rather than optional extras.[4] Ecochain similarly points to reporting frameworks and supply-chain transparency becoming increasingly important as regulations like CSRD and CBAM expand internationally.[2]

The operational lesson is simple: if procurement teams are not involved early, sustainability targets often stall.

Credibility comes from iteration, not perfection

One thing I appreciate about science-based target frameworks is that they are structured around measurable reductions and periodic validation rather than broad environmental promises.[3][6]

The companies making steady progress are usually the ones treating sustainability planning as an ongoing operational capability:

  • establish a baseline
  • identify the largest emissions sources
  • set reduction targets
  • revisit assumptions annually
  • improve data quality over time

That approach is less dramatic than “carbon neutral by 2030” announcements, but probably more useful.

Climate accounting still contains uncertainty, especially in Scope 3 calculations and supplier data. Most serious frameworks acknowledge that openly.[3][6] The important distinction is whether a company is building systems that can improve with better evidence — the same way good engineering teams iterate on imperfect early versions instead of waiting for ideal conditions.

Sources