How will temperature be affected by more energy added to air molecules in the low atmosphere of greenhouse...?

you need to be more specific than that. Radiation varies by wavelength and the whole issue with how the Earth's temperature is related to this goes back to figuring out the energy budget. The incoming radiation is primary shortwave (visible spectrum to some ultra violet that makes it down to the surface).  When the earth heats up, this energy is re emitted to the atmosphere are long wave radiation (primarily infared). Some of this energy is reabsorbed by water vapor and carbon dioxide, two of the most prominent greenhouse gases (there are others and it should also be noted that water vapor outweighs the effects all other greenhouse gases exponentially)

but yes, more energy added into the atmosphere increases air temperature