I DID IT ... but I can do better because I had a coffee in the morning ... realizing what that meant, I drank cold brewed tea after lunch.
I am now accustom to an invigorating cold shower, wash my few dishes and clothes in cold water. Shave, wash hands, rinse my cup: ALL COLD!!
The way to reduce CO2 emissions from the household is to TURN OFF THE GAS. Electricity CO2 reductions come via wind, solar, non-carbon fuel.