Xerox believes it has found a way to dramatically reduce the consumption of paper: The firm has developed a technology that automatically erases the prints on paper after one day – and allows the paper to be reused “multiple times”.

A new technology, which Xerox calls “erasable paper”, could dramatically change this scenario: The company said it has developed a technology that blurs the line between paper documents and digital displays and, in its present version, self-erases prints in about 16-24 hours. According to the company, the erasable paper may use “compounds that change color when they absorb a certain wavelength of light but then will gradually disappear.”

and add this technology to 450 gb paper lol .. we have another hdd :)