Publications

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

November 2022 (Revised April 2025)
Teaching Note

Driving Decarbonization at BMW - Teaching Note

By: Shirley Lu, George Serafeim and Michael W. Toffel

Teaching note in support of the case "Driving Decarbonization at BMW" (HBS No. 123-008) View Details

August 2024
Case

Iogen: Decarbonizing Hard-to-Abate Sectors

By: George Serafeim, Charlotte Foody and John Mulliken

Brian Foody, CEO of Iogen Corporation, was an early leader in advanced biofuels, developing a range of technologies to transform agricultural waste into transportation fuel. With $100 million in revenue and 350 patents across various biofuel technologies, Iogen was... View Details

Keywords: Technology; Biofuel; Market Attractiveness; Decarbonization; Technological Innovation; Climate Change; Energy; Environmental Sustainability; Transformation; Market Entry and Exit; Strategy; Energy Industry; United States; United Kingdom

December 2023 (Revised November 2024)
Supplement

Decarbonizing Shipping at A.P. Møller-Maersk (B)

By: Willy Shih, Michael W. Toffel and Kelsey Carter

This is a (B) case supplement to 624-049 Decarbonizing Shipping at A.P. Møller-Maetsk View Details

Keywords: Decarbonization; Shipping; Biofuel; Ship Transportation; Energy Sources; Shipping Industry

Article

Decarbonization Factors

By: Alex Cheema-Fox, Bridget LaPerla, George Serafeim, David Turkington and Hui (Stacie) Wang

In the face of accelerating climate change, investors are making capital allocations seeking to decarbonize portfolios by reducing the carbon emissions of their holdings. To understand the performance of portfolio decarbonization strategies and investor behavior... View Details

Keywords: ESG; Investment Management; Factor Investing; Investor Behavior; Climate Change; Environmental Sustainability; Investment; Management

Find at Harvard

December 2022
Supplement

Driving Decarbonization at BMW - Video Supplement

By: Shirley Lu, George Serafeim and Michael W. Toffel

Videos of Thomas Becker, Vice President of Sustainability and Mobility at BMW Group, in support of the case "Driving Decarbonization at BMW" (HBS No. 123-008) View Details

October 2022 (Revised June 2024)
Case

Driving Decarbonization at BMW

By: Shirley Lu, George Serafeim and Michael W. Toffel

The case describes BMW’s electrification and decarbonization strategy, and how the company measured carbon emissions throughout the life cycle of its vehicles and used tools like carbon abatement cost curves to evaluate decarbonization opportunities. In mid-2022,... View Details

2019
Working Paper

Decarbonization Factors

By: Alex Cheema-Fox, Bridget LaPerla, George Serafeim, David Turkington and Hui (Stacie) Wang

In the face of accelerating climate change, investors are making capital allocations seeking to decarbonize portfolios by reducing the carbon emissions of their holdings. To understand the performance of portfolio decarbonization strategies and investor behavior... View Details

Keywords: ESG; Investment Management; Factor Investing; Investor Behavior; Climate Change; Environmental Sustainability; Investment; Management

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

2021
Article

Decarbonizing Everything

By: Alex Cheema-Fox, Bridget LaPerla, George Serafeim, David Turkington and Hui (Stacie) Wang

We analyze how the use of different climate risk measures leads to different portfolio carbon outcomes and risk-adjusted returns. Our findings are synthesized in a rules-based investment framework, which selects a different type of climate metric across industries and... View Details

Keywords: Climate Risk; ESG; ESG (Environmental, Social, Governance) Performance; ESG Disclosure; ESG Disclosure Metrics; ESG Ratings; Investing; Investing For Impact; Investment Strategy; Environment; Decarbonization; Climate Change; Environmental Sustainability; Environmental Management; Environmental Accounting; Investment; Strategy; Investment Portfolio; Investment Return

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2023
Working Paper

Cost-Efficient Decarbonization of Portland Cement Production

By: Gunther Glenk, Anton Kelnhofer, Rebecca Meier and Stefan Reichelstein

Accounting for nearly 8% of global annual carbon dioxide (CO2) emissions, the cement industry is considered difficult to decarbonize. While a sizeable number of abatement levers for Portland cement production is becoming technologically ready for deployment, many are... View Details

May 2023
Article

Decarbonizing Health Care: Engaging Leaders in Change

By: Vivian S. Lee, Kathy Gerwig, Emily Hough, Kedar Mate, Robert Biggio and Robert S. Kaplan

Health care leaders are often surprised to learn that their operations contribute significantly to a warming climate. In addition to their roles as responders to and victims of extreme weather events, health care organizations have an obligation to reduce... View Details

Keywords: Health Care; Decarbonization; Carbon Emissions; Net-zero Emissions; Climate Change; Health Care and Treatment; Health Industry

September 2024
Supplement

Allbirds: Decarbonizing Fashion (B)

By: Michael W. Toffel, Kenneth P. Pucker and Stacy Straaberg

The Allbirds: Decarbonizing Fashion (B) case encourages students to assess Allbirds’ product development and go-to-market strategies now that Allbirds is a publicly listed company. The (B) case provides a 2024 update on Allbirds including its initial public offering,... View Details

Guest Column

Decarbonizing Economy Requires Lot More Electricity: Big Ramp-ups in Solar, Wind Power Are Needed

By: Jurgen Weiss

The column summarizes the findings of a report prepared for the Coalition for Community Solar Access, which concludes that to achieve New England's 2050 economy-wide greenhouse gas emissions reductions goals would require increasing the annual deployments of new... View Details

Keywords: Decarbonization; Electricity; Renewable Energy; Green Technology; New England

23 Oct 2019
Working Paper Summaries

Decarbonization Factors

Keywords: by Alex Cheema-Fox, Bridget LaPerla, George Serafeim, David Turkington, and Hui (Stacie) Wang

December 2023
Case

Raízen: Helping to Decarbonize the World?

By: Gunnar Trumbull, Pedro Levindo, Daniel Tong and Rafaella Mazza

Raízen, the world’s largest sugar and ethanol producer, strived to find ways to expand the second-generation ethanol (E2G) market, which it pioneered. The company planned to invest R$24 billion (around $4.6 billion) in 20 production plants, with a total capacity to... View Details

Keywords: Plant-Based Agribusiness; Factories, Labs, and Plants; Renewable Energy; Environmental Sustainability; Production; Expansion; Agriculture and Agribusiness Industry; Energy Industry; Brazil; Europe; North America; United States; Argentina; Paraguay