Lhasa, capital of southwestern China's Tibet Autonomous Region, releases about 563.5 tons of oxygen each year through its afforestation project, according to the city's forestry and grassland bureau.

The city launched an afforestation project in 2012 and has planted and preserved more than 234 hectares of forests. These forests can store more than 631 tons of carbon.

Lhasa has carried out a series of afforestation experiments at various altitudes and in different seasons to screen out suitable seedlings. The city has planted more than 1.2 million seedlings, including shrubs and flowers, according to the bureau.

(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)