Premier League clubs have come under fire for the use of domestic flights this season, with some 30-minute flights between fixtures criticised for their impact on the environment.
But clubs are also judged on what else they are doing to improve their climate credentials, with an annual table measuring everything from use of plastic to plant-based food.
For the fourth consecutive season, Sport Positive, working with BBC Sport, has ranked all 20 Premier League clubs based on their environmental efforts.
Here are the key findings:
- For the second year running, Tottenham and Liverpool have come joint top.