The [global cooling](https://en.wikipedia.org/wiki/Global_cooling) hypothesis of the 1970s included the theory that aerosols lead to [global dimming](https://en.wikipedia.org/wiki/Global_dimming). That is, that pollutants reduces the amount that the Sun warms the Earth, causing the Earth's surface to cool.

My understanding is that the theory itself was sound, though in the end the effects of greenhouse gases dominated the trend. Hence, climate change takes the form of global warming.

Setting aside the obvious biological effects from aerosol pollution (e.g. less plant growth), how much of that pollution would be physically required to offset global warming? Are the effects even in the same ballpark?