Publications

April 2025
Teaching Note

Allbirds: Decarbonizing Fashion (A) and (B)

By: Michael W. Toffel, Ken Pucker and Stacy Straaberg

Teaching Note for HBS Case Nos. 622-024, 625-004, 625-005, and 625-702. The Allbirds: Decarbonizing Fashion (A) case introduces Allbirds as a footwear startup not only focused on simple design, comfort, and sustainable natural materials but on decarbonizing the wider... View Details

Keywords: Decarbonization; Climate Impact; Environmental Strategy; Innovation; Product Design; Supply Chain Management; Innovation Strategy; Innovation and Management; Product Development; Climate Change; Environmental Management; Environmental Sustainability; Business Startups; Initial Public Offering; Knowledge Sharing; Apparel and Accessories Industry; Fashion Industry; United States; California

April 2025
Supplement

Allbirds: Decarbonizing Fashion PowerPoint Supplement

By: Michael W. Toffel, Ken Pucker and Stacy Straaberg

The Allbirds: Decarbonizing Fashion (A) case introduces Allbirds as a footwear startup not only focused on simple design, comfort, and sustainable natural materials but on decarbonizing the wider fashion industry. Background material highlights the growing... View Details

Keywords: Decarbonization; Climate Impact; Environmental Strategy; Innovation; Product Design; Supply Chain Management; Innovation Strategy; Innovation and Management; Product Development; Climate Change; Environmental Management; Environmental Sustainability; Apparel and Accessories Industry; Fashion Industry; United States; California

March 2025
Case

Calyx Global: Rating Carbon Credits

By: Michael W. Toffel and Adam Chen

This case describes how rating agencies and other organizations are seeking to improve the quality of carbon credits sold in the voluntary carbon market to organizations seeking to use them to supplement their internal decarbonization efforts to meet their net zero... View Details

Keywords: Service Design; Certification; Auditing; Auditor Reputation; Carbon Credits; Carbon; Rating Agency Disagreement; Ratings; Climate Change; Business Model; Environmental Sustainability; Corporate Social Responsibility and Impact; Conflict of Interests; Reputation; Business Strategy

March 2025 (Revised March 2025)
Case

Good for the Seller, Good for the Buyer and Good for Society: Sampo-yoshi, Sustainability and Trust at ITOCHU

By: Sandra J. Sucher and Bethelehem Y Araya

In 2024, ITOCHU CEO Masahiro Okafuji was at a crossroads. As the thirteenth CEO since ITOCHU’s founding in 1858, he had fueled the company’s growth since 2011 by bringing ITOCHU’s founding philosophy of Sampo-yoshi (good for the seller, good for the buyer and... View Details

Keywords: Sustainability; Trust; Profit; Growth and Development Strategy; Organizational Change and Adaptation; Mission and Purpose; Corporate Social Responsibility and Impact; Environmental Sustainability; Japan

March 2025
Case

The Changing Climate on Wall Street

By: Clayton S. Rose, Maxim Pike Harrell and Michael Norris

Increasing and conflicting regulatory requirements and political pressures regarding climate change tested the leaders of U.S. financial institutions, as they struggled to determine how best to comply while managing their business and its risks. In October 2024,... View Details

February 2025
Tutorial

Preparing Business Leaders for an Era of Climate Instability: Understanding and Managing Physical Climate Risk

By: Michael W. Toffel and Spencer Glendon

In this compelling video, Spencer Glendon, founder of Probable Futures and Executive Fellow at Harvard Business School, describes the profound implications of climate change for businesses, the economy, and societies around the world. Drawing from his background in... View Details

Keywords: Modeling; Climate Change; Adaptation; Risk and Uncertainty; Risk Management; Forecasting and Prediction

2025
Article

Educating Students and Professionals on the Business Implications of Climate Change

By: Michael W. Toffel

As climate change poses unprecedented challenges and opportunities, the private sector must play a pivotal role in both adaptation and mitigation efforts. This article discusses the new Harvard Business School Online course, Business and Climate Change, designed to... View Details

Keywords: Climate Impact; Online Courses; Online Education; Decarbonization; Mitigation Policies; Climate Risk; Climate Change; Risk Management; Science; Policy; Business Education; Adaptation

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2025
Chapter

Sustainability and Green Business in Latin America

By: Geoffrey Jones

This chapter argues that since the nineteenth century capitalism has created much wealth, but at the cost of massive ecological destruction, which has been particularly severe in Latin America. During the first global economy before 1929, considerable wealth was... View Details

Keywords: Environmental Sustainability; Business History; Globalization; Economic Growth; Latin America

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January 2025
Supplement

Hippo: Weathering the Storm of the Home Insurance Crisis (B)

By: Lauren Cohen, Grace Headinger and Sophia Pan

Rick McCathron, CEO of Hippo, was optimistic about the InsurTech's path to profitability after navigating the financial uncertainties of 2022. By bundling their home insurance services with third-parties and established insurance incumbents, Hippo was adopting a... View Details

January 2025
Teaching Note

Vytal: Packaging-as-a-Service

By: George Serafeim, Michael W. Toffel and Stacy Straaberg

Teaching Note for HBS Case No. 124-007. The Germany-based startup Vytal operated the largest digital-native reusable packaging-as-a-service network globally, having raised nearly €15 million, established a large network of restaurant partners, and prevented the use of... View Details

January 2025 (Revised April 2025)
Case

Blue Frontier: Disrupting Air Conditioning

By: Rosabeth Moss Kanter and Jacob A. Small

Serial entrepreneur Daniel Betts founded Blue Frontier in South Florida to offer a climate-friendly solution to increase air conditioning efficiency and dehumidify using new technology he developed. Backed by significant venture capital, Blue Frontier had to choose... View Details

Keywords: Entrepreneurship; Climate Change; Environmental Sustainability; Technological Innovation; Market Entry and Exit; Performance Efficiency; Business Strategy; Florida

January 2025
Case

A Tiger in the Tank: Exxon Sues Investors

By: Clayton S. Rose, Sarah Sasso and James Weber

In June 2024, investors were trying to make sense of ExxonMobil’s (Exxon) lawsuit against two impact investors, Arjuna Capital (Arjuna) and Follow This, that had just been dismissed by the U.S. District Court of Northern Texas. Exxon’s suit challenged the rights of two... View Details

December 2024 (Revised January 2025)
Case

Balancing Returns and Responsibilities at Raya Partners

By: Arthur Segel, Ephraim Mernick, Derek C. M. van Bever and Olivia Barba

Raya Partners, a private equity firm, faces a crucial decision regarding Asa Specialty Coatings Company (ASCC). The dilemma involves shifting ASCC's manufacturing operations to Mexico, a move that would boost profitability and reduce emissions but result in significant... View Details

Keywords: Factories, Labs, and Plants; Communication Strategy; Private Equity; Job Cuts and Outsourcing; Corporate Social Responsibility and Impact; Environmental Sustainability; Values and Beliefs; Financial Services Industry; Manufacturing Industry; Mexico; Vermont

November 2024
Case

Polish Agro: Where Do We Grow from Here?

By: Willy C. Shih, Lena Duchene and Daniela Beyersdorfer

By July 2024, Polish Agro had grown into one of Poland’s fastest-growing agribusinesses, with €230 million in revenue, 82 employees, and operations across Northern Poland. The company supported farmers with essential agricultural inputs like fertilizers and seeds,... View Details

November 2024
Case

Ather Energy: The Future of Mobility

By: Shunyuan Zhang, Kannan Srinivasan and Malini Sen

Ather Energy, India’s third-largest electric scooter maker by volume, was founded in 2013. Five years later, the start-up launched its first electric scooter, Ather 450, which was powered by artificial intelligence (AI) and the Internet of Things (IoT), to navigate... View Details

Keywords: Energy Policy; Climate Change; Alternative Energy; Corporate Entrepreneurship; Transportation; Transformation; Green Technology; Technology Adoption; Communication Strategy; Marketing Strategy; Customer Focus and Relationships; Asia; India

October 2024
Course Overview Note

Risks, Opportunities, and Investments in the Era of Climate Change (ROICC)

By: George Serafeim

This course overview note introduces the course Risks, Opportunities, and Investments in the Era of Climate Change to students. View Details

Keywords: Environment; Innovation; Technology; General Management; Organizational Transformations; Investments; Entrepreneurship; Strategy; Finance; Accounting; Leadership; Climate Change; Environmental Sustainability; Management

September 2024
Case

TechEnergy Ventures: Innovating Through Corporate Venture Capital

By: Rebecca Karp and Lena Duchene

This case examines TechEnergy Ventures, the corporate venture capital (CVC) arm of the Techint Group, and its role in scaling innovation within the energy sector. Founded in 2021, TechEnergy Ventures operates with a mandate to invest in disruptive technologies to... View Details

September 2024 (Revised February 2025)
Case

Aramco: Navigating the Energy Transition

By: Tarun Khanna and Gizem Cihan Dincsoy

In March 2024, Amin Nasser, president, and CEO of the Saudi Arabian Oil Company (Aramco), had just delivered a speech about the future of energy at a global energy conference. The world was behind schedule in meeting long-term climate change goals. The global shift... View Details

Keywords: Energy Transmission; Oil ＆ Gas; Economic Diversification; Corporate Strategy; Leadership; Business Strategy; Goals and Objectives; Transition; Environmental Sustainability; Diversification; Energy Industry; Saudi Arabia

September 20, 2024
Article

It’s Time to Unbundle ESG

By: Aaron K. Chatterji and Michael W. Toffel

ESG is at an inflection point. It has come to represent a broad and inchoate aspiration for what business should be doing beyond maximizing shareholder value. With ESG advocates on the defensive, business leaders need a new roadmap to determine which factors to... View Details

Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; ESG Reporting; ESG Disclosure; Sustainability; Climate; Climate Finance; Climate Risk; Social Accounting; Investment; Governance; Safety; Climate Change; Environmental Sustainability; Corporate Social Responsibility and Impact; Financial Services Industry