U.N. Secretary General Ban Ki-moon and United Arab Emirates Minister of State Al Jaber attend a conference on climate change in Abu Dhabi
U.N. Secretary General Ban Ki-moon (L) and United Arab Emirates (UAE) Minister of State Sultan Ahmed Al Jaber attend a conference on climate change in Abu Dhabi May 4, 2014. Ban said on Sunday he was hopeful that a goal of limiting global temperature rises to a maximum 2 degrees Celsius could be achieved, but urged governments to take practical action before it was too late. REUTERS/Stringer (UNITED ARAB EMIRATES - Tags: ENVIRONMENT POLITICS)
U.N. Secretary General Ban Ki-moon speaks during a conference on climate change in Abu Dhabi
U.N. Secretary General Ban Ki-moon speaks during a conference on climate change in Abu Dhabi May 4, 2014. Ban said on Sunday he was hopeful that a goal of limiting global temperature rises to a maximum 2 degrees Celsius could be achieved, but urged governments to take practical action before it was too late. REUTERS/Stringer (UNITED ARAB EMIRATES - Tags: ENVIRONMENT POLITICS)
U.N. Secretary General Ban Ki-moon speaks during a conference on climate change in Abu Dhab
U.N. Secretary General Ban Ki-moon speaks during a conference on climate change in Abu Dhabi May 4, 2014. Ban said on Sunday he was hopeful that a goal of limiting global temperature rises to a maximum 2 degrees Celsius could be achieved, but urged governments to take practical action before it was too late. REUTERS/Stringer (UNITED ARAB EMIRATES - Tags: ENVIRONMENT POLITICS)
U.N. Secretary General Ban Ki-moon attends a conference on climate change in Abu Dhabi
U.N. Secretary General Ban Ki-moon (3rd R) attends a conference on climate change in Abu Dhabi May 4, 2014. Ban said on Sunday he was hopeful that a goal of limiting global temperature rises to a maximum 2 degrees Celsius could be achieved, but urged governments to take practical action before it was too late. REUTERS/Stringer (UNITED ARAB EMIRATES - Tags: ENVIRONMENT POLITICS)
UN's Ban urges climate action ahead of New York Summit
Governments have promised to limit temperature rises to avert ever more floods, droughts and rising sea levels
Pro-Russia protesters storm the governor's business premises in Donetsk, eastern Ukraine
Pro-Russia protesters storm the governor's business premises in Donetsk, eastern Ukraine May 3, 2014. A couple of hundred pro-Russian protesters in the eastern city of Donetsk stormed the governor's business premises and the state security headquarters, ransacking files and smashing windows. The attack reflected growing disorder in the area, targeting as it did a security building that was already largely under rebel control. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)
A pro-Russia protester waves a Donbass flag as they storm the governor's business premises in Donetsk
A pro-Russia protester waves a Donbass flag as they storm the governor's business premises in Donetsk, eastern Ukraine May 3, 2014. A couple of hundred pro-Russian protesters in the eastern city of Donetsk stormed the governor's business premises and the state security headquarters, ransacking files and smashing windows. The attack reflected growing disorder in the area, targeting as it did a security building that was already largely under rebel control. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)
An endangered silverback mountain gorilla from the Nyakamwe-Bihango family feeds within the forest in Virunga national park near Goma
An endangered silverback mountain gorilla from the Nyakamwe-Bihango family feeds within the forest in Virunga national park near Goma in eastern Democratic Republic of Congo, May 3, 2014. The world's remaining about 720 wild mountain gorillas live along the volcanic range straddling the Rwandan, Congolese and Ugandan borders. REUTERS/Kenny Katombe (DEMOCRATIC REPUBLIC OF CONGO - Tags: ENVIRONMENT SOCIETY ANIMALS)
An endangered silverback mountain gorilla from the Nyakamwe-Bihango family looks for food within the forest in Virunga national park near Goma
An endangered silverback mountain gorilla from the Nyakamwe-Bihango family looks for food within the forest in Virunga national park near Goma in eastern Democratic Republic of Congo, May 3, 2014. The world's remaining about 720 wild mountain gorillas live along the volcanic range straddling the Rwandan, Congolese and Ugandan borders. REUTERS/Kenny Katombe (DEMOCRATIC REPUBLIC OF CONGO - Tags: SOCIETY ENVIRONMENT ANIMALS)
An endangered silverback mountain gorilla from the Nyakamwe-Bihango family yawns within the forest in Virunga national park near Goma
An endangered silverback mountain gorilla from the Nyakamwe-Bihango family yawns within the forest in Virunga national park near Goma in eastern Democratic Republic of Congo, May 3, 2014. The world's remaining about 720 wild mountain gorillas live along the volcanic range straddling the Rwandan, Congolese and Ugandan borders. REUTERS/Kenny Katombe (DEMOCRATIC REPUBLIC OF CONGO - Tags: SOCIETY ENVIRONMENT)