What it is
Climate finance, broadly, is the flow of capital toward climate solutions and away from high-emission activities. It spans green bonds (debt specifically earmarked for environmental projects), sustainability-linked loans (loans whose interest rate changes based on whether the borrower hits climate targets), climate-focused venture capital and private equity, and blended finance (public or philanthropic capital used to reduce the risk of private investment, often in emerging markets where climate projects would otherwise struggle to get funded).
Sustainable investing approaches
Sustainable investing covers a few distinct approaches that get lumped together:
- ESG investing (introduced in Climate Policy & Economics) — incorporating environmental, social, and governance factors into investment decisions, largely as a risk-management lens.
- Impact investing — investing explicitly for measurable positive social or environmental outcomes alongside financial return, a step beyond ESG’s risk-management framing toward intentional impact.
- Divestment — selling off investments in fossil fuel companies, often used by institutions like universities or pension funds as a form of activism or long-term risk reduction rather than a return-driven strategy.
Climate-related financial disclosure
Climate-related financial disclosure deepens the CSRD/SEC/SB 253 mentions from Climate Policy & Economics with its own specific vocabulary:
- TCFD (Task Force on Climate-related Financial Disclosures) — established the standard categories companies use to report climate risk: governance, strategy, risk management, and metrics and targets. TCFD itself was disbanded in 2023 once regulators judged its job done; its recommendations now live on inside the ISSB’s IFRS S1 and S2 standards, which the IFRS Foundation uses to track corporate progress, and CSRD’s disclosure categories also draw on TCFD’s original structure. If you see “TCFD-aligned” in a job posting or company report, it usually means “follows the framework that became ISSB,” not an active standard on its own.
- Financed emissions — the emissions a bank or investor is indirectly responsible for through its loans and investments, effectively a Scope 3 category (see Climate Science Fundamentals) specific to financial institutions. Measured using the PCAF (Partnership for Carbon Accounting Financials) standard. Think of it like secondhand smoke: the bank isn’t burning the fuel itself, but if it lent the money that built the coal plant, that plant’s emissions show up on the bank’s climate ledger too.
- Green taxonomies — official classification systems, like the EU Taxonomy, that define which economic activities count as “environmentally sustainable” for disclosure and investment-labeling purposes. These exist largely in response to greenwashing (see Climate Policy & Economics): a taxonomy makes the label auditable instead of a marketing claim. Like CSRD, the EU Taxonomy’s own reporting scope was narrowed in the EU’s 2026 Omnibus simplification, so its practical reach today is smaller than when it first passed.
- Transition finance — capital directed at helping high-emission companies (steel, cement, shipping) decarbonize over time, distinct from financing pure-play clean companies outright. It’s a newer and more debated category, since it can blur into funding companies that aren’t meaningfully changing their business.
Why finance teams now own carbon accounting
A theme that ties this topic back to Climate SaaS: carbon accounting increasingly sits with finance teams, not just sustainability teams, because it’s becoming audit-grade financial disclosure rather than a voluntary sustainability exercise. That shift in ownership is a large part of why Climate SaaS products increasingly speak in finance-department language (materiality, audit trails, controls) rather than sustainability-department language (impact, footprint, commitments).
Why it matters
Climate policy creates disclosure mandates; Climate SaaS builds the software finance and sustainability teams use to comply with them. This topic is the connective tissue between the two. Understanding financed emissions, ISSB/TCFD, and green taxonomies is what makes sense of why so much of the Climate SaaS product landscape is built around audit-grade reporting rather than voluntary sustainability marketing.