It acts as the green lung & carbon sink for Delhi.

Collectively, these places will form the so-called 'green lung' of the Central Area.

The area today serves as the green lung for Bhopal City.

The park also serves as an important green lung for Singapore's downtown city area.

So, there is a potential of these hills to be used as the green lungs of the city.

The cemetery used to be a green lung, but much of the lawn has been cemented over.

It is a potential green lung & carbon sink for India's capital.

Portoselvaggio is one of the main green lungs in the Puglia region.

I see sustainably managed forests as being a sort of green lung.

It improves the environment for local people, giving them a 'green lung' and cleaner air to breathe.