AlHijjah 18, 1434, Oct 23, 2013, SPA -- U.N. Secretary-General Ban Ki-moon on Tuesday called for a clean-energy transformation to help put the world on a more sustainable path, emphasizing that such efforts will require innovation, investment, and collaboration. "Achieving a clean-energy transformation will need the combined efforts of governments, multilateral investment banks, private finance, civil society, and the knowledge community, and the private sector," Ban said in the keynote speech at the Third Global Green Growth Forum in Copenhagen, Denmark. "We are partners on a path to sustainability. ... But we have no time to waste." The U.N. chief said the way energy is produced and used is "the dominant cause" of climate change. "The impact on our global economy is increasingly clear. We count the cost in human lives and economic loss," he said. "But, we are forging solutions together all over the world." Ban stressed that the world is fast approaching a triple deadline. The target date for achieving the global anti-poverty targets known as the Millennium Development Goals (MDGs) comes at the end of 2015. World leaders also have agreed on 2015 as the year for establishing a new sustainable development framework and reaching an agreement on climate change.