Guide
Convert GST Invoices & E-Way Bills to Emissions Data
How to convert Indian GST tax invoices and e-way bills into audit-ready Scope 1, 2, and 3 emissions data. HSN codes, UQC units, and logistics ton-km formulas.
5 min read
ZeroCarbon Publications
Notes on carbon, compliance and the work in between
Perspectives on how emissions data should work, practical guides to CBAM and BRSR, and the regulatory news that changes what exporters and listed companies have to do.
Featured · Perspective
Spend-Based vs Activity-Based Carbon Accounting
Why auditors reject spend-based carbon accounting under BRSR Core and CBAM. How inflation distorts EEIO models and why physical activity data is required.
4 min read
Latest
Guide
Scope 2 Emissions from DISCOM Electricity Bills Guide
Calculate Scope 2 emissions from Indian DISCOM bills using CEA Baseline v20.0. Learn why active kWh matters over kVAh and how to avoid power factor distortions.
4 min read
Guide
SEBI BRSR Core Assurance: 9 KPIs & Circular Rules
SEBI BRSR Core assurance requirements under Circular CIR/2023/122 and CIR/2025/42. Detailed breakdown of the 9 ESG KPIs, glide path, and SSAE 3000 audit rules.
4 min read
Guide
What a CBAM Verifier Checks in an Indian Plant: Audit Guide
Audit checklist for EU CBAM verification in Indian mills. How accredited verifiers inspect production boundaries, calorific values, and precursor emissions.
4 min read
Guide
BRSR Value Chain Scope 3: Guide for Indian Suppliers
How SEBI BRSR value-chain disclosures push Scope 3 requests down to Indian MSMEs. The 2% threshold, questionnaire fatigue, and sharing Product Carbon Footprints.
4 min read
Perspective
Why Emission Factors Must Be Versioned & Fail Closed
Why auditable carbon accounting engines require versioned, effective-dated emission factors and fail-closed architecture to survive BRSR and CBAM audits.
4 min read
Guide
India CCTS Guide: Emission Trajectories & ICM Portal
A guide to India's Carbon Credit Trading Scheme (CCTS), Gazette S.O. 2824(E), BEE emission intensity targets, compliance cycles, and power exchange trading.
5 min read
Perspective
Why traditional carbon accounting is the bottleneck
Carbon accounting is slow because the work is manual data collection, not calculation. Why spreadsheets and annual consultant cycles can't keep up with CBAM and BRSR.
5 min read
Guide
What CBAM default values cost your EU buyer, worked through for Indian steel
A worked example with the official EU default values and benchmarks: what 1,000 tonnes of Indian hot-rolled steel costs an EU importer under CBAM in 2026, 2027 and 2028.
4 min read
Perspective
Why the AI should never be the one computing your emissions
Language models are excellent at reading documents and poor at being a system of record. How to split the work so AI carbon accounting stays auditable.
3 min read
News
CBAM's first bill arrives in 2027: what changed in 2026
The EU CBAM definitive period started on 1 January 2026. The 50-tonne threshold, the first certificate prices, corrected default values and the 2028 downstream extension.
3 min read
News
BRSR Core in FY 2026-27: assurance reaches the top 1,000 listed companies
SEBI's glide path brings BRSR Core assessment or assurance to India's top 1,000 listed companies from FY 2026-27. Value-chain disclosure stays voluntary with a 2% threshold.
2 min read
News
US climate disclosure in 2026: the SEC steps back, California does not
The SEC has proposed rescinding its climate disclosure rules, while California's SB 253 emissions reporting goes ahead with a 10 November 2026 deadline. What it means for suppliers.
2 min read
News
India's carbon market closes its first compliance year
Under India's Carbon Credit Trading Scheme, around 490 plants in seven sectors now have binding emission-intensity targets. First filings closed on 31 July 2026.
2 min read
Design Partners
Exporting steel or aluminium to the EU?
We are onboarding a small group of Indian exporters to prepare their first CBAM data with us.
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