Reading the article, it's just aimed at pointless receipts. Think paying cash for a loaf of bread and a pint of milk. You don't need paper for that. Update POS software to ask before printing.

Also, it's mostly thermal paper these days. I don't even think you can make that biodegradable and if you can there's plenty of chemicals in there you probably don't want releasing into nature. At this point it's easier to just get rid of them than to replace them with dot matrix printers again.

Email is the wrong solution as well. Nobody wants to fuck about at the till going "danny dot f underscore 32 at yahoo dot mail dot org". No operator wants to have to type that in. Half the time they'd type it wrong. I don't want them to even have my email address, because I know they'll spam the fuck out of it. I'd rather they just send a bunch of sale metadata to my credit card provider or something, so the proof of sale could be on there.

I just don't take a receipt unless it's for something that might need to go back. Equally pointless are the shops that ask if you need a receipt, but they've already printed it anyway so they just chuck it in a bin behind them.