The study investigates the impact of volcanic aerosols on tropical marine clouds, using satellite observations of volcanic eruptions in Hawaii. It finds that volcanic aerosols significantly enhance cloud cover and reflectivity, leading to substantial cooling effects. The observed strong negative aerosol forcing suggests that current global warming may be driven by a weaker net radiative forcing than previously thought, arising from the competing effects of greenhouse gases and aerosols. This implies greater sensitivity of Earth's climate to radiative forcing and a larger warming response to rising greenhouse gas concentrations and reductions in atmospheric aerosols due to air quality measures. The findings also indicate that marine cloud brightening (MCB) could be effective in mitigating global warming, particularly in humid and stable conditions in the tropics where solar radiation is strong. However, the study highlights the need for further research to understand the complex interactions between aerosols and clouds, as well as the potential risks and side effects of MCB.The study investigates the impact of volcanic aerosols on tropical marine clouds, using satellite observations of volcanic eruptions in Hawaii. It finds that volcanic aerosols significantly enhance cloud cover and reflectivity, leading to substantial cooling effects. The observed strong negative aerosol forcing suggests that current global warming may be driven by a weaker net radiative forcing than previously thought, arising from the competing effects of greenhouse gases and aerosols. This implies greater sensitivity of Earth's climate to radiative forcing and a larger warming response to rising greenhouse gas concentrations and reductions in atmospheric aerosols due to air quality measures. The findings also indicate that marine cloud brightening (MCB) could be effective in mitigating global warming, particularly in humid and stable conditions in the tropics where solar radiation is strong. However, the study highlights the need for further research to understand the complex interactions between aerosols and clouds, as well as the potential risks and side effects of MCB.