A good strategy to boost self esteem is to, D: Set ambitious, but realistic goals.
Answer:
i would just apologize too.
My statement would probably go something like this, "I'm sorry for hurting your feelings, but I was just joking. I didn't mean the things I said and I'll be careful about what I say from now on."
I mean that's really all you could say lol
D because if you are trying to reduce the carbon footprint then using less coal or oil based energy would be best. plus using the solar panels will help because all you have to rely on is the sun and your own power bank for energy. there for leaving less of a carbon footprint.