How much paper actually gets recycled? 60% ? Even paper sent to recycling depots is often contaminated or too low grade to recycle. If it is not suitable for recycling, it goes to a tip where it most likely decomposes to methane and CO2, right? So why don't we have 'Paper Vaults', where paper, cardboard and other products that can decompose into methane and CO2 can be stored either deeply, under pressure or in temperature and humidity controlled conditions where they are less likely to break down and release their emissions into the atmosphere - at least for the next 30 years, while the world undertakes urgent steps for radical decarbonisation? For example, a underground mine could be adapted to make a Paper Vault. The first customers could be the recyclers who have to dispose of contaminated paper and cardboard. My research is that this is probably 40% of all paper that is sent for recycling. Possibly more. If each big city and town in the world had a Paper Vault, this could delay the emission of many billions of tons of methane and CO2 into the atmosphere. The delay could be anywhere between 20 and 2,000 years, ever so slightly curbing the climate emergency of today. In a world with Paper Vaults, trees being grown for paper would become net emissions negative, as the CO2 they suck up from the atmosphere would be sequestered, instead of carbon neutral at best, as they are now. At present they are both taking out and putting back in equal measure. With the advent of the Paper Vault they become carbon sucking and sequestering machines.