The United Nations is considering the risks of spraying “sulfate aerosols” above the earth’s surface to reduce global temperatures, according to a Reuters report.

According to a Reuters report on the issue, “controversial methods” of geoengineering are now being actively considered by the UN to limit and reverse global temperature increases.

“For example, humans could spray sulfate aerosols – tiny reflective particles – into the stratosphere 20 to 25 kilometers (12 to 16 miles) above the earth’s surface to reflect more sunlight back into space, which lowers global temperatures,” states the report.

However, using this method would create “uncertainty, moral issues (and) ethical issues” because “sulfate aerosols have the side effect of also lowering average precipitation.”

While such methods would benefit some countries by creating a cooling effect, other regions “could suffer by, for example, no longer having conditions to grow crops.”

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