The top scientist for the Geneva-based United Nations Environmental Programme said the organization is exploring the topic of climate engineering because “growing concerns about the lack of global efforts to cut emissions” is driving more interest in technological fixes that have been discredited by recent research.

“It’s naive to ignore a group of technologies that could have global implications,” said Andrea Hinwood , UNEP’s chief scientist.

Geoengineering broadly covers a wide range of mechanical or chemical methods to try to change the global climate system. It includes unproven concepts such as dimming sunlight by intentionally polluting the upper atmosphere with thousands of tons of artificial particles, including chemical sprays or mineral dust. The idea is to slow the rise of glo

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