I'm not finding an excuse. I'm just accepting that my lifestyle is a huge source of carbon emissions. I'm also accepting that the last time the earth was more-or-less carbon neutral was prior to the industrial revolution. No one is clamoring for a return to that type of lifestyle, especially because doing so would require a massive decrease in the population. You can rattle your saber about Bitcoin all you want, but it's not going to change reality: there is no way to sustain this many humans with our quality of life and be carbon neutral, let alone negative.