The condition of the room you are working can affect the mood. Sometimes there are conditions that are not felt directly on our senses. However, if prolonged, would affect the peace.
Fluctuating temperature difference when working indoors can cause anxiety and loss of concentration.
Light entering the room could give effect to the savings in electricity usage. This also indirectly reduce carbon consumption for electricity generation.
Carbon emission reductions ranging from micro-scale can be done by using plants as a supplementary element of the room.