You might want to think about your choice of building materials, your lighting, heating, water consumption and many other variables in relation to the environment and your 'energy footprint'.
To get you started, take a look at the following links and take it from there, - or contact Livspace for a consultation. We also perform Energy Audits.
It is very satisfying to bring down the size of your footprint. You are placing yourself consciously in the context of humanity as a whole.