system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What happened to unbleached paper products?

Back in the 90's environmentally conscious consumers learned to shop for unbleached paper products to reduce the amount of toxic materials required for production. It meant the product were invariably very off-white but still fully functional. Seems like these products have totally disappeared from retailer shelves.  What happened?
gpt
Basically they found far more environmentally friendly ways of achieving the same effect without bleach. Mostly this will be hydrogen peroxide. This is H2O2 - water with an extra oxygen molecule. It breaks down into water and doesn't pollute and is cheap and easy to produce. Things that used to be 'unbleached' are more likely to be advertised now as 'chlorine free'. Chlorine was the main bad thing about bleach.