A new Scientific Reports study warns that dimming the Sun with sulfur aerosols could cause severe side effects, including disrupted monsoons, ozone loss, and acid rain. Researchers stress that despite its cooling potential, such geoengineering carries unpredictable global risks that outweigh short-term benefits.A new Scientific Reports study warns that dimming the Sun with sulfur aerosols could cause severe side effects, including disrupted monsoons, ozone loss, and acid rain. Researchers stress that despite its cooling potential, such geoengineering carries unpredictable global risks that outweigh short-term benefits.