Which one of the following is related to global dimming?

Global dimming refers to the gradual reduction in the amount of global direct irradiance at the Earth's surface caused by increased atmospheric aerosols and particulate matter (from pollution, volcanic emissions, etc.). These particulates scatter and absorb sunlight before it reaches the surface, leading to a measurable fall in surface temperature in many regions. It partially masks the warming effect of greenhouse gases. Hence global dimming is associated with a fall in temperature due to increased particulates.