From Estimates to Action: Lessons from NYCW 2026

Climate Week NYC 2026 brought together business leaders, policymakers, investors, and climate practitioners around a clear theme: moving from ambition to action. Organized by The Climate Group, this year’s program focused on energy, impact, and action, with hundreds of events taking place across New York City. 

Three lessons stood out.

1. Auditability is becoming a design requirement

Auditability can no longer be treated as a final step before reporting. It needs to be built into the way climate data is collected, managed, and used.

At Sweep’s Scope 3 workshop, we discussed the gap between having a number and being able to defend it. According to data shared during the session, only 16% of organizations have more than three-quarters of their reporting data audit-ready, while average audit readiness sits at around 51%.

The takeaway is not to wait for perfect data. It is to give every estimate a clear source, methodology, owner, and improvement path. For product carbon footprints, detailed data is only useful when teams can trace it back to evidence, explain the assumptions behind it, and update it over time.

2. Supplier engagement is not a survey problem

Many companies still approach supply chain emissions by sending increasingly detailed questionnaires to their suppliers. The conversations we heard at Climate Week suggested that this is the wrong starting point.

Suppliers have different levels of data maturity, resources, and influence. Some can provide product-level information, while others are still building a basic emissions inventory. Treating them all the same creates friction and often produces poor-quality responses.

As Renaud Bettin put it: “A lead company cannot simply impose uniform rules on all its suppliers. It is a starting point, but it must also accompany and guide them towards a decarbonization approach adapted to their reality.”

Supplier engagement is therefore not just about collecting better information. It is about helping suppliers build their capabilities and turning data requests into progress.

3. Emissions are only half the climate story

The most challenging idea we encountered came from the Climate Contribution Framework, or CCF.

Most corporate climate strategies focus on reducing a company’s own emissions. That remains essential, but it does not capture the full contribution a company can make. The CCF adds two further dimensions: scaling climate solutions and financing climate action.

That broader view matters especially for companies whose products or services help other organizations reduce emissions. Their own footprint still matters, but measuring only that footprint can overlook the value they create through the solutions they provide.

From reporting to climate performance

Across our own workshops and the events we attended, the direction of travel was clear. Climate management is becoming more demanding, more collaborative, and more closely connected to business performance.

Companies need data that can stand up to scrutiny, supplier engagement models that lead to action, and a broader way to assess the value they create.