Thank you for raising the profile of the role of aerosols. Indeed, aerosols are a critical factor in climate science, and they have been the subject of intensive study for many years. It has been estimated that about 90% of aerosols are natural (sea salt, dust, pollen, volcanic emissions, etc.) and that 10% of aerosols are anthropogenic in origin (burning of wood and biomass, fossil fuels, industrial emissions, etc.). Some of the human-caused aerosols contribute to atmospheric warming (black carbon for example) while others cause atmospheric cooling. On balance, I think most scientists believe that the net effect of anthropogenic aerosols results in a cooling effect. This is all extremely complex, and difficult to model. In general, I think that the less junk we pump into the atmosphere the better, even if reducing emissions initially speeds warming. What is really critical is that we stop using fossil fuels ASAP and that we stop burning down the planet's forests.