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Johannes Fiegenbaum

Johannes is a sustainability consultant and early-stage climate tech investor. With a background in marketing technology, he now helps companies grow sustainably—whether through ESG strategy, carbon accounting, or positioning for Article 9 VC funds. He regularly writes about corporate decarbonisation, product LCAs, and climate innovation, drawing on hands-on experience with startups, investors, and sustainability leaders across Europe.

PPAs and CSRD Compliance: Energy Strategy for Scope 2 Emissions

When does a power purchase agreement cut real emissions, and when does it only improve your Scope 2 figure? The additionality test and what ESRS E1 asks for.

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ESG Integration and CSRD Reporting: A Guide for Medium-Sized Companies in 2025

Discover how medium-sized companies can benefit from ESG integration and prepare for the CSRD reporting requirements starting in 2025.

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Avoiding Greenwashing and Driving True Sustainability: Strategies for Credible ESG Communication

The test a green claim must pass in the EU from 27 September 2026: which claims are banned outright, what evidence has to be on file, and the wording that holds up.

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TRL and LCA in Product Development: Early Sustainability Integration

How to integrate Technology Readiness Level (TRL) and Life Cycle Assessment (LCA) early in sustainable product development for ESG impact, cost reduction and innovation.

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EU Product Environmental Footprint (PEF): A Clear Guide for Product Teams

Complete PEF guide for 2026: EU methodology, Product Environmental Footprint Category Rules (PEFCRs), 16 impact categories, certification path for product teams.

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EU ETS 2 Explained: How Emissions Trading Expands to Buildings & Transport

ETS2 prices fuels for buildings and road transport from 2028, with fuel suppliers as the regulated entity. Scope, timeline, cost per litre and kWh, next steps.

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