Could we remove carbon dioxide from the atmosphere, or shade the planet with sulfate particles?
It's possible that sulfate particles added repeatedly to the same area over time would clump together.
We also consider the activation of mixed soot / sulfate particles in cloud updrafts.
Mitigating NOx might have other benefits, however, such as slowing the formation of sulfate particles in Asian megacities8.
Sulfur dioxide gas, when converted to sulfate particles in the atmosphere, has long been the primary cause of Eastern haze.
The eruption resulted in sulfate particles in the stratosphere that reflected the sun's rays back to space, and as a consequence the earth briefly cooled.
The eruption injected enough sulfate particles into the stratosphere to counteract, for two years, the inexorable climb in global temperatures related to rising greenhouse-gas concentrations.
With an engine, it's sulfur in, sulfur out, in the form of sulfur dioxide and sulfate particles, which contribute to smog.
Most of these conversations focus on the idea of injecting sulfate particles into the stratosphere to screen out the sun's radiation, as happens when volcanoes erupt.
One of the most popular geoengineering approaches shading the earth with a haze of sulfate particles in the upper atmosphere would very likely lead to severe droughts.
But he says research should focus on developing the most effective and lowest-risk option for injecting sulfate particles into the atmosphere.
