Columbia subject headings:
Harvard subject headings:
Air quality management--Evaluation--OECD countries--Congresses.
Air quality management--OECD countries--Evaluation.
Environmental protection--Economic aspects--OECD countries--Congresses.
Environmental protection--Economic aspects--OECD countries.
Greenhouse gas mitigation--OECD countries--Congresses.
Greenhouse gas mitigation--OECD countries.
Greenhouse gases--Environmental aspects--OECD countries--Congresses.
Greenhouse gases--Environmental aspects--OECD countries.
Princeton subject headings:
Air quality management--Evaluation--OECD countries--Congresses.
Environmental protection--Economic aspects--OECD countries--Congresses.
Greenhouse gas mitigation--OECD countries--Congresses.
Greenhouse gases--Environmental aspects--OECD countries--Congresses.