"Officially known as stratospheric aerosol injection, dimming the sun is one of the most famous and controversial geoengineering ideas of all. Typically, stratospheric aerosol injection (SAI) involves the release of tiny sulfur dioxide (SO2) particles into the stratosphere by planes to reflect sunlight. Once injected into the stratosphere, sulfur dioxide forms sunlight-reflecting sulfate aerosols, said to have a cooling effect similar to that of a major volcanic eruption."
"The madcap ideas - which are being proposed by other researchers in the field - come at a high cost, are not feasible, and could even have dangerous knock-on effects, they say. Geoengineering is the large-scale manipulation of environmental processes that affect Earth's climate, in an attempt to halt global warming. There are geoengineering projects in various stages of progress all around the world, not just the polar regions."
Risky geoengineering projects are being considered for the Arctic and Antarctic. Concepts such as stratospheric aerosol injection (dimming the sun), sea curtains, glass beads, and ocean fertilization could cause irreversible damage to fragile polar environments. These proposals carry high costs, lack feasibility, and may generate dangerous knock-on effects. Polar regions are pristine and little-understood, increasing the potential for unintended consequences. Stratospheric aerosol injection involves releasing sulfur dioxide (SO2) into the stratosphere to form sunlight-reflecting sulfate aerosols and produce cooling similar to a major volcanic eruption. High atmospheric SO2 levels can cause nausea, vomiting, stomach pain, and corrosive damage to airways and lungs. Seasonal darkness restricts year-round SAI deployment in polar areas.
Read at Mail Online
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