Gee, this is depressing!
I consider myself to be someone careful.
I do recycling, avoid the car in town, try to use local products, try to not to wast water, electricity... but even with this it says if everybody was like me we would need 2.5 planets!!!
Or maybe I made a mistake, I hope so, some questions are quite precise.

I think you didn't. The simple fact of living in an industrialized country make us big time wasters. This is depressing, I agree.

I thought that the plain hours influenced a lot.
Have you done the test?