 |  | Οικολογική Επιθεώρηση: ηλεκτρονικό περιοδικό για τη φύση, το περιβάλλον και την πολιτική οικολογία, 2008 [source: Οικολογική Επιθεώρηση] |
|
 |
 |  | A Statement from the International Council for Science / World Meteorological Organization Joint Committee for the International Polar Year 2007–2008 pp. 16, Feb. 2009 [source: YPI 2007-2008] |
|
 |
 |  | HP has launched a free Guide to Greener Printing, offering practical advices on being more efficient printers and cutting their environmental impact without compromising quality. [source: Hewlett-Packard] |
|
 |
 |  | Έκδοση ενημερωτικού εντύπου από το Υπουργείο Ανάπτυξης και τη Γενική Γραμματεία Καταναλωτή [Οκτώβριος 2007] |
|
 |
 |  | Chemical Week, Vol. 169, No. 34, pp. 23-26, Oct. 24, 2007 [source: Chemical Week] |
|
 |
 |  | Environment for Europeans, No. 25, p. 11, Sept 2006 [source: European Commission] |
|
 |
 |  | Environment for Europeans, No. 25, p. 6, Sept 2006 [source: European Commission] |
|
 |
 |  | Environment for Europeans, No. 25, p. 5, Sept 2006 [source: European Commission] |
|
 |
 |  | European Commission, pp. 39, 2004 [source: European Commission] |
|
 |
 |  | by Paul T. Anastas & Julie B. Zimmerman Environmental Science & Technology, Vol. 37, No. 5, pp. 94A-101A, Mar. 1, 2003 [source: Environmental Science and Technology] |
|