When enrolling with the 2FA take a screenshot of the QR code, print it and add it to wherever you keep your secure documents. The QR code is your private key, just scan it again to add a new device if you lose your original.
Obviously you need to keep the code secure!
Planes and shipping are ‘only’ about 2% each, they’re far from the biggest polluters. For the big polluters you’ve got road transport, agriculture and industry etc…
https://ourworldindata.org/ghg-emissions-by-sector