The Voice Behind the Argument
Marie Donnelly is not someone who speaks lightly about European sustainability policy. As the former Director for Renewables, Energy Efficiency and Innovation at DG Energy in the European Commission, she helped shape the Clean Energy for All Europeans package, one of the most significant shifts in European energy law in a generation. She served as Chairperson of Ireland's Climate Change Advisory Council, the statutory body that independently assesses Ireland's progress toward its legally binding climate targets. She sits on the Governance Committee of MaREI, Ireland's leading marine and renewable energy research institute, and on the Advisory Board of the UCD Energy Institute. In April 2026, she received the ESG Leader Award at the Business & Finance ESG Awards, held in partnership with Grant Thornton at the Mansion House in Dublin, recognising her outstanding contribution to advancing sustainability policy and steering Europe's energy transition.
When someone with that biography writes a detailed analysis of what European ESG strategy has gotten wrong and what still needs fixing, it's worth reading carefully. Donnelly's piece, published in Business & Finance this week, is exactly that kind of analysis — clear-eyed, technically grounded, and uncomfortable in the right places. The core argument is this: European ESG strategy has matured enormously over the past decade, but a series of regulatory gaps and design flaws are now threatening to undermine the credibility of the entire framework at the moment it needs to be strongest.
From Voluntary to Mandatory: How Europe Got Here
Donnelly traces the trajectory of European ESG strategy as a journey from fragmented voluntary disclosure toward one of the world's most comprehensive regulatory ecosystems. The shift from principles-based ESG to a standardised classification system, and from investor-led disclosure to regulator-mandated transparency, happened faster than almost anyone predicted. The EU Taxonomy, the Sustainable Finance Disclosure Regulation, the Corporate Sustainability Reporting Directive and the Corporate Sustainability Due Diligence Directive together represent a regulatory architecture that no other major economy has attempted at comparable scale. For Irish companies — particularly those in European supply chains, which is most of Ireland's internationally trading SME sector — this shift from voluntary to mandatory isn't abstract. It's a compliance obligation that is already in effect for large companies and is cascading down supply chains toward businesses of all sizes.
The CSRD alone requires companies to report under the European Sustainability Reporting Standards using a double materiality framework, meaning they must assess both how sustainability issues affect their business financially and how their business affects the environment and society. Limited assurance on that sustainability data is already mandatory. Reasonable assurance — the same standard applied to financial accounts — is expected from 2028. Over 50,000 EU-based companies are now subject to CSRD, with ESG teams increasingly integrated directly into finance, internal audit and risk functions rather than sitting as standalone sustainability departments. For context: a year ago most of those companies were still treating sustainability reporting as a communications exercise. Today it's audited, structured and embedded in financial reporting, and the penalties for getting it wrong are increasingly real.
The EU's Omnibus Simplification: Relief or Risk?
Hardly a month passed in 2025 without the European Commission publishing new proposals to simplify and streamline sustainability regulation, creating what ESG legal specialists have described as an "Omnibus exhaustion" among compliance teams trying to keep pace. Significant changes were proposed to the CSRD, the CSDDD, the EU Taxonomy, the EU Deforestation Regulation and the Carbon Border Adjustment Mechanism. The stated rationale was reducing administrative burden on business. The practical effect, Donnelly's analysis implies, was to introduce regulatory uncertainty at precisely the moment businesses needed clarity to make long-term investment decisions aligned with sustainability targets.
This is a tension that sits at the heart of European sustainability policy right now. The Commission needs the private sector to invest at scale in the energy transition, in clean infrastructure, in supply chain transformation. That investment requires long-term confidence that the regulatory framework is stable. Repeated simplification proposals, whatever their individual merits, collectively send a signal that the rules might change again, and that signal chills rather than encourages the capital commitments Europe needs. Ireland's businesses, already navigating tariff uncertainty and energy price volatility from the Middle East conflict as the backdrop to 2026's otherwise robust economic performance, are more exposed to that policy uncertainty than most, given how deeply embedded Irish corporate activity is in European supply chains.
What the Green Claims Directive Changes for Irish Business
One specific regulatory development Donnelly's analysis flags as particularly consequential is the EU Green Claims Directive, expected to take effect from 2026 onwards. The directive will require environmental claims — "carbon neutral," "net zero," "sustainable," "eco-friendly" — to be independently verified and properly substantiated before they can be used in marketing or consumer communications. This effectively closes the door on a decade of vague environmental branding and greenwashing that has flourished in the absence of enforcement. For Irish businesses that have built marketing strategies around broad sustainability claims, this is a near-term compliance requirement that demands action now, not when the directive's enforcement provisions fully bed in.
The business case for getting ahead of this is stronger than it might appear. Companies that have already built robust, evidenced sustainability claims will face less disruption and will find their credibility with European buyers, investors and regulators enhanced as the Green Claims Directive shifts the baseline for what responsible environmental communication looks like. Companies that haven't will face a choice between rapid investment in measurement and verification or the reputational and commercial exposure of being asked to substantiate claims they can't actually support.
The Gaps That Still Need Fixing
Donnelly's central argument is that European ESG strategy has made remarkable progress in a short time but retains structural gaps that, if left unaddressed, could undermine its credibility. The most significant are the consistency gap — the divergence in how different member states are implementing the same EU directives, creating an uneven compliance playing field across the single market — the SME gap, where the regulatory architecture was designed around large corporations and the practical burden on smaller businesses in supply chains is still not adequately managed, and the data gap, where even with CSRD now in force, the quality and comparability of ESG data across the European corporate sector remains highly variable, limiting its usefulness to investors and policymakers alike.
There is also a geopolitical dimension that Donnelly, given her European Commission background, is well placed to address. European ESG strategy was designed in a geopolitical environment of reasonably stable global trade and multilateral cooperation. The world of 2026 — US tariff uncertainty, Middle East energy instability, a more transactional approach to international agreements — is a significantly different operating environment. European sustainability investment that was financially viable under one set of global conditions may need to be reconsidered under another, and the regulatory framework needs to be resilient enough to guide those decisions without being so rigid that it prevents companies from adapting intelligently to changed circumstances.
What This Means for Irish Sustainability Leaders Right Now
For Irish sustainability directors, ESG managers and board members who have spent the past two years building reporting frameworks, measurement systems and supply chain assessments in anticipation of the CSRD, Donnelly's analysis carries a specific practical message: the regulatory direction is clear and irreversible, even if the detail continues to evolve. Ireland is not an outlier in this. According to the EPA, Ireland is currently projecting a reduction of around 29% in greenhouse gas emissions by 2030 against a legally binding target of 51%. The gap between national ambition and national delivery is significant, and the pressure on Irish businesses to accelerate their own ESG performance, rather than wait for policy to catch up, is only going to increase as the 2030 deadline approaches.
The organisations best positioned for the decade ahead will be those that treat ESG not as a reporting function but as a strategic intelligence system — a capability for understanding how their business affects and is affected by the world around it, and for turning that understanding into competitive advantage, capital efficiency and long-term resilience.
The Bottom Line: Marie Donnelly has spent more time than almost anyone in Europe shaping the sustainability policy architecture now bearing down on Irish business. Her assessment that the architecture, while impressive, still has significant gaps is not a reason for pessimism. It's a reason to stay close to the direction of travel, build internal ESG capability now rather than later, and treat sustainability compliance not as a burden but as the business intelligence exercise it's increasingly becoming.
Sustainability Pulse covers climate, energy, ESG and environmental policy through an Irish lens. Subscribe to the Sustainability Pulse Briefing — every Wednesday.