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Taken together, these two approaches are known as geoengineering.The unknown unknowns -- especially with solar geoengineering -- could be just as bad as the known challenges presented by climate change.This is why the Elders, a group of independent global leaders, is calling on the international community to agree on a rigorous governance framework for geoengineering, and to put it in place without delay.This week, the U.N. Environment Assembly -- the world's highest-level decision-making body on environmental issues -- will consider whether to initiate a global learning process on both the science and governance of geoengineering. To this end, the UNEA would call for a worldwide assessment of these emerging technologies, giving all countries a common platform of knowledge.This is vital for environmental sustainability, international security and the well-being of future generations around the world.Instead, the world should focus on learning more, including via the process at the UNEA, in order to understand the full range of options and assess their risks with the best information available.
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