5 Key takeaways from California’s new climate change reporting rule

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illuminem summarises for you the essential news of the day. Read the full piece on Forbes or enjoy below:

🗞️ Driving the news: The California Air Resources Board (CARB) has adopted final rules requiring major companies to report greenhouse gas emissions starting August 10, 2026
• The regulation implements Senate Bill 253, part of California’s 2023 Climate Accountability Package
• Companies with over $1 billion in annual revenue and doing business in California must report Scope 1 and Scope 2 emissions in 2026

🔭 The context: Scope 3 supply-chain emissions reporting is delayed until 2027
• A related law, SB 261 (climate risk disclosure for firms above $500 million revenue), is currently paused by courts
• The rule applies only to companies “doing business in California,” as defined under state tax law
• CARB signaled enforcement flexibility for first-year, good-faith reporting

🌍 Why it matters for the planet: Mandatory emissions disclosure increases transparency and accountability for large emitters
• Even without Scope 3 in year one, the rule covers some of the biggest corporate sources of direct and energy-related emissions
• California’s move may influence other U.S. states and potentially revive momentum for federal climate disclosure standards

⏭️ What’s next: Legal challenges could delay or reshape implementation
• Companies are now preparing data systems ahead of the August 2026 reporting deadline
• Debate over Scope 3 requirements is likely to intensify before 2027

💬 One quote: The California Air Resources Board said it will exercise enforcement discretion for “good-faith first-year submissions.”

📈 One stat: The rule applies to companies with more than $1 billion in annual revenue that do business in California

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