Plastic bags never. Break. Down. They get infinitely smaller, and we ingest the micro-pieces. If the 126 million households in the US used ONE less bag a week, we’d use 6.5 billion fewer plastic bags a year. End to end, they would wrap around the Earth over 7 times. Stuff that in your kitchen drawer.
Do your books runneth over? Donate them to your local library, find a Little Free Library nearby, sell them to a used-book shop or give them to a local nursing home or homeless shelter. For old textbooks and outdated books, just give that cover a rip and recycle the pages.