Tottenham are the greenest Premier League club, coming top of a table measuring the sustainability of all 20 top-flight sides.
"Looking to our future beyond the current pandemic, our message is that the climate needs to be at forefront of all our minds," said Spurs chairman Daniel Levy.
"We have seen people take greater pride in their environment during the lockdowns of the past year. When we return to normality, we cannot slip back into bad habits and lose sight of this."
The sustainability table: What, how and why?
First published in 2019 by BBC Sport and the United Nations-backed Sport Positive Summit, the rankings have been updated along with the criteria and methodology.