How can I prove my household's carbon emission reductions with semi-complex physics?

Hi, I'm an Australian high school physics student currently studying the effects of high energy living upon the environment. As a physics student, I need to prove the steps I've made to reduce my household's carbon footprint with relevant physics equations/support. An example of this would be how reducing a hot water system's overall temperature would result in the saving of energy (q=mcT, reduce T to reduce q). Can anyone provide me with more examples pertaining to reducing household emissions?