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clean air ['kli:n 'ɛə]
construct.	Reinluft f
English thesaurus
Clean Air ['kli:n 'ɛə]
USA	CA

cleaning air: 31 phrases in 14 subjects

Agriculture	3
Agronomy	3
American usage, not spelling	1
Automobiles	2
Chemistry	2
Construction	3
Environment	4
General	1
Mechanic engineering	1
Microelectronics	1
Natural resourses and wildlife conservation	3
Nuclear physics	4
Sample preparation	1
Technology	2