Contrails VS Stratospheric Aerosol Injection AKA Chemtrails

What is stratospheric aerosol injection?

Stratospheric aerosol injection is a proposal for cooling the climate by injecting small particles, or aerosols, into the atmosphere about 10 miles above the Earth’s surface, said Chris Field, a Stanford University professor and director of the university’s Woods Institute for the Environment.

The theory is that the particles would reflect sunlight back into space, reducing global warming. The particles could be sulfur dioxide or calcium carbonate, Field said. Both are naturally occurring chemical compounds.

“The evidence that this could cool the climate is strong, based on observations of past volcanic eruptions, our basic understanding of atmospheric chemistry and physics, and lab experiments,” said Field, who chaired a 2021 National Academies of Science report on solar geoengineering research. “There are still many unknowns, reflecting limited experimentation.”

Nature’s version of stratospheric aerosol injection is a strong volcanic eruption that injects dust particles and gas, such as sulfur dioxide, into the stratosphere, said Kevin Trenberth, a National Center of Atmospheric Research distinguished scholar.

In 1991, the eruption of Mount Pinatubo in the Philippines resulted in about 20 million tons of sulfur dioxide into the stratosphere, according to a fact sheet from the United States Geological Survey. That caused global temperatures to drop by about 1 degree Fahrenheit for two years, from 1991 to 1993.

SOURCE: https://www.poynter.org/fact-checking/2023/cia-director-john-brennan-video-chemtrails/