Speaking to hundreds of international delegates at the start of a climate gathering in Abu Dhabi, Ban Ki-moon warned that time is running out to reduce harmful emissions and that political leaders need to offer bold commitments to drive meaningful change.
"If we do not take urgent action, all our plans for increased global prosperity and security will be undone," he warned.
Ban was in the UAE capital to mark the start of a conference meant to lay the groundwork for a climate summit he has called for world leaders in September.
They aim to focus on a range of strategies to address climate change, including deployment of renewable energy, efforts to improve energy efficiency and the use of more sustainable agriculture.
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Ban's September meeting in turn is designed to provide impetus for efforts to secure a sweeping climate deal involving rich and poor nations in 2015. That is the target year negotiators in a UN-led process have set for themselves after a 2009 summit in Copenhagen ended in discord.
No major breakthroughs are expected to emerge from the Abu Dhabi meeting, though organizers hope it will boost momentum for upcoming talks.
The secretary-general told reporters that negotiations that fall under the United Nations Framework Convention on Climate Change have been "disappointingly slow," and that this week's meeting aims to accelerate the process while helping policymakers to look beyond domestic political considerations.
Although it owes much of its wealth to fossil fuel, the emirate has sought to position itself as a leader in clean energy and has invested billions of dollars in the sector.
It is home to the International Renewable Energy Agency, as well as a government-backed initiative known as Masdar that is investing in renewable energy technology and developing what aims to be an environmentally sustainable model city in the desert.