Albedo is a measure of the amount of light reflected back by an object that is incident on it.
So, high albedo means that a greater portion of light falling on something is reflected back. This also means a that greater amount of light goes back towards outer space which is then absorbed by the greenhouse gases present in the atmosphere. Thus high albedo contributes to global warming.
Now, if we consider low albedo, then that means a greater portion of light is absorbed thus raising the temperature or otherwise the heat content of the body. Less light is reflected back for greenhouse gases to capture. But then absorbed heat itself contributes towards global warming.
So as I understand, both low and high albedo contribute towards global warming. Is this understanding of mine correct?
When we do climate change engineering, what do we try to do in terms of albedo? Do we try to achieve high albedo or low albedo?
Additionally I want to know about the effect of 'concrete jungles' in urban areas on global warming?