Prince Ali, Princess Rym and their daughter Princess Jalilah plant a tree during an Arbor Day ceremony on January 15, 2008.
B. Great Britain
The Prince of Wales raises his spade triumphantly after a dozen successful tree plantings.
Source: 1 - Belga Pictures; 2-8 & 10-12 - Getty Images; 9 - Zimbio; Montage by Sunnystar
C. The Netherlands
Prince Willem-Alexander and his then-fiancee Maxima Zorreguieta planting a tree in the Oranje Nassau Pavilion at Keukenhof in Lisse. May 09, 2001.
Crown Princess Victoria and Professor and Nobel Peace Prize laureate Wangari Maathai planting a tree as a symbol of friendship between Kenya and Sweden during a reception at the Swedish School in Nairobi on November 14, 2009.
Crown Prince Frederik and Crown Princess Mary planting a tree in Canberra, Australia.
Queen Paola planting a tree during a visit to arboretum Kalmthout near Antwerp, Belgium on 16 October 2009.
Source: Jesse Willems/Belga
Queen Sonja hand over her flower bouquet to King Harald to plant a tree during a State Visit to Switzerland in 2006.
Source: UK Press
Prince Albert plants a tree at Aras an Uachtarain, the official residence of the President of Ireland during a State visit on April 4, 2011 in Dublin, Ireland.