A Palestinian protester hurls stones toward Israeli troops during a protest marking Land Day in the West Bank village of Nabi Saleh near Ramallah, Saturday, March 28, 2015 (Photo: AP)

A Palestinian throws back a tear gas canister toward Israeli troops during a protest marking Land Day, in the West Bank village of Nabi Saleh near Ramallah, Saturday, March 28, 2015 (Photo: AP)

Volker Kraft, 78 years old, right, arranges eggs at an apple tree decorated with about 10,000 painted Easter eggs in the garden of retired couple Christa and Volker Kraft in Saalfeld, Germany, Saturday, March 28, 2015 (Photo: AP)

Participants perform aerodance during Earth Hour in Quezon city, metro Manila March 28, 2015 (Photo: Reuters)

People pay their respects at the memorial for the victims of the air disaster in the village of Le Vernet, near the crash site of the Germanwings Airbus A320 in French Alps March 28, 2015 (Photo: Reuters)

An arms depot explodes at the Jabal Hadeed military compound in Yemen's southern port city of Aden March 28, 2015 (Photo: Reuters)

Arab leaders, including, the Egyptian President, Abdel Fattah El-Sisi (C), the Emir of Kuwait, Sheikh Sabah al-Ahmad al-Sabah (center - R), the Saudi King Salman (7th R, front), Yemen's President Abdo Rabbo Mansour Hadi (3 - R), pose during a group picture at the 26th Arab Summit in Sharm al-Sheikh, in the South Sinai governorate, south of Cairo, March 28, 2015 (Photo: Reuters)

Leifeng Pagoda is seen behind the West Lake during Earth Hour in Hangzhou, Zhejiang province, March 28, 2015 (Photo: Reuters)

A woman waits to register to vote in a polling station during elections in Kano March 28, 2015 (Photo: Reuters)

The Taipei 101 building is seen during Earth Hour in Taipei March 28, 2015 (Photo: Reuters)

Traffic moves in front of the Chhatrapati Shivaji terminus railway station, also known as Victoria terminus, before Earth Hour in Mumbai March 28, 2015 (Photo: Reuters)

A general view shows Yintai Centre buildings, with their red light on top turned off, during Earth Hour in Beijing's central business district, March 28, 2015 (Photo: Reuters)

Rebel fighters from Suqour al-Sham Brigade stank on a tank during clashes with forces loyal to Syria's president Bashar al-Assad as they flee Idlib city, after rebel fighters took control of the area, on Al-Mastumah hill March 28, 2015 (Photo: Reuters)