The Beijing 2022 Winter Olympics was a great success. Chinahas kept the promise to hold a green Olympics. Many green actions made itpossible, like providing environmentally friendly smart beds, using new energy(能源)cars supportingsporting places with 100% clean energy and reusing rain and snow water

Take making ice as an example. China didn't use R507a commonmaterial to make ice because it isn't friendly enough to the environment. Through18 months' hard work, China independently developed the CO₂ directcooling technology.

A net of tubes runs under the ice. High-pressure liquid(液态)CO₂ goesthrough them to create heat(热) exchange. The CO₂evaporates(蒸发) under the ice surface. The evaporationtakes in heat and turns water on the surface into ice. And the CO goes intoanother circle. This technology helps to make ice better and faster. And aboveall, it is much greener because there's no new CO₂ produced. Amongall the 15 ice sporting places in the Winter Olympics, 7 used the CO₂direct cooling technology to make ice. As a result, much less pollution wascaused.

Beijing did so much more to save energy. Beijing built thenew sporting places with green materials. As for the old ones, Beijing used newglass walls to take the place of traditional walls

tolet more natural light in. 70% of the waste heat was also reused to keep warmand dry. And a large number of new energy cars were used at the Beijing 2022Winter Olympics

The Beijing 2022 Winter Olympics is the first to trulyachieve carbon neutrality(碳中和), and it has set new standards in green technologies. Somenewspapers say China has set an example for the world in environmentalprotection and green development.