DAN PLANETA ZEMLJE Datum 22.4. Linkovi http://en.wikipedia.org/wiki/Earth_Day http://landscaping.about.com/od/weedsdiseases/a/earth_day.htm http://www.earthdaybags.org/ http://earthday.wilderness.org/history/ http://www.earthday.net/resources/history.aspx http://www.themesh.com/abouted.html