This work is published under the responsibility of the Secretary-General of the OECD. The opinions expressed and arguments employed herein do not necessarily reflect the official views of the member countries of the OECD or The World Bank, its Board of Executive Directors or the governments they represent or the United Nations Environment Programme.
© OECD, The World Bank and UN Environment 2018
The use of this work, whether digital or print, is governed by the Terms and Conditions to be found at https://www.oecd.org/termsandconditions.