Olympic ice rinks put spotlight on potent greenhouse gases

An athlete from the Netherlands skates during a speed skating practice session ahead of the 2022 Winter Olympics, Thursday, Feb. 3, 2022, in Beijing. (AP Photo/Ashley Landis)

Karina Safina and Luka Berulava, of Gerogia, compete during the pairs short program figure skating competition at the 2022 Winter Olympics, Friday, Feb. 4, 2022, in Beijing. (AP Photo/Jeff Roberson)

Members of the Canadian short track speedskating team train at the 2022 Winter Olympics, Thursday, Feb. 3, 2022, in Beijing. (AP Photo/Natacha Pisarenko)

Misato Komatsubara of Japan performs her routine during a practice session for the ice dance figure skating competition at the 2022 Winter Olympics, Thursday, Feb. 3, 2022, in Beijing. (AP Photo/Natacha Pisarenko)

Athletes from Germany skate during a speedskating practice session ahead of the 2022 Winter Olympics, Thursday, Feb. 3, 2022, in Beijing. (AP Photo/Gerald Herbert)

An athlete laces their skate during a speedskating practice ahead of the 2022 Winter Olympics, Wednesday, Feb. 2, 2022, in Beijing. (AP Photo/Ashley Landis)