Use OH to do something meaningful: Display your own daily CO2 footprint. Fully automated - incl "how to display"

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Isn’t OH2 a great hobby? Even better if this hobby made the world a bit better - by reducing your own personal CO2 consumption. Many people are doing something, but does this turn the needle? You only know that you drive too fast if you have an odometer, right?
Here is yours for your CO2 emissions. On the main contributors:

all by Openhab 2, MQTT and easy to get, cheap incredients. including sources. (both for 8266 and Openhab)
find the how-to here: and please: share your solution, I will add it.

Add on:
now that you have all your CO2 relevant information handy in OpenHAB: what are cool ways to display them. Find it here:
PS: Thought it was time for an update. Holiday season gave me the free time :wink: