WHAT RUNS A RUN · FEBRUARY 23, 2026

Data, Dirt, and Distance – Deciphering the Carbon Footprint of Running

In this episode, host Kamal Datta sits down with Dr. Brian McCullough, Associate Professor and Director of the Center for Sport & Sustainability at the University of Michigan and explores explores the environmental impact of events, particularly focusing on the different scopes of emissions (Scope 1, 2, and 3) and the challenges associated with data collection and reporting. The speakers discuss how events, especially those held outdoors, can have varying impacts based on participant numbers and the limitations of available data. Key takeaways: Events are concentrated on one weekend or a week. Scope 3 emissions are significantly high for events. Data collection for events can be inconsistent. Comparisons per participant have limitations. Some data may not be precise or complete. Understanding Scope 1 and Scope 2 impacts is crucial. Outdoor events may have different environmental impacts. Reporting on emissions varies by organization. Gray data presents challenges in analysis. Accurate data is essential for sustainability efforts. Episode Chapters

Data, Dirt, and Distance – Deciphering the Carbon Footprint of Running48:19

CHAPTERS

3 KEY TAKEAWAYS

  1. 01Scope 3 emissions are significantly high for events.
  2. 02Data collection for events can be inconsistent.
  3. 03Comparisons per participant have limitations.

SHOW NOTES

In this episode, host Kamal Datta sits down with Dr. Brian McCullough, Associate Professor and Director of the Center for Sport & Sustainability at the University of Michigan and explores explores the environmental impact of events, particularly focusing on the different scopes of emissions (Scope 1, 2, and 3) and the challenges associated with data collection and reporting. The speakers discuss how events, especially those held outdoors, can have varying impacts based on participant numbers and the limitations of available data.

Key takeaways:
Events are concentrated on one weekend or a week.

  • Scope 3 emissions are significantly high for events.
  • Data collection for events can be inconsistent.
  • Comparisons per participant have limitations.
  • Some data may not be precise or complete.
  • Understanding Scope 1 and Scope 2 impacts is crucial.
  • Outdoor events may have different environmental impacts.
  • Reporting on emissions varies by organization.
  • Gray data presents challenges in analysis.
  • Accurate data is essential for sustainability efforts.


Episode Chapters

00:00 Introduction to Sport Ecology and Sustainability

04:12 The Evolution of Sport Ecology Research

06:49 Frameworks for Measuring Sustainability in Events

09:36 Understanding Carbon Emissions in Sporting Events

12:31 Data Quality and Challenges in Emission Calculations

15:28 The Role of Travel in Scope 3 Emissions

18:20 Improving Data Accuracy and Methodologies

21:12 Future Directions in Sport Ecology Research

25:40 Recommendations for Race Organizers

29:57 The Importance of Reduction Over Offsetting

35:40 Understanding the Sustainable Runner

42:31 Future of Marathons and Sustainability

48:28 Measuring the Impact of Supporters

References: