大氧吧

dàyǎngbā
  1. source of oxygen (of forests and nature reserves)
  2. (cliché) lungs of the planet

CEDICT

Entry Composition

1 大 dà
  1. big; large; great
  2. older (than another person)
  3. eldest (as in 大姐 dàjiě)
  4. greatly; freely; fully
  5. (dialect) father
  6. (dialect) uncle (father's brother)
2 氧吧 yǎngbā oxygen bar