Summary:

- Aerosols are tiny particles suspended in the atmosphere that can come from natural sources like volcanoes or human activities like burning fossil fuels.
- These aerosols can have a cooling effect on the climate by reflecting sunlight back into space, offsetting some of the warming caused by greenhouse gases.
- However, as we reduce aerosol emissions to improve air quality, this "masking effect" will diminish, and the full impact of global warming will become more apparent.