Ecology is one of the most important areas of human life. In 2050, the UN division responsible for preserving the Earth in its original form will begin to sound the alarm on deforestation. Unless it’s stopped, they say, the Earth faces irreversible changes. Since the second industrial revolution put a tablet or other portable electronic device into the hands of every person, it will be decided to ban paper as an information medium, together with all wood-cellulose products. This will happen gradually, over two decades, starting from 2030. First, the production of matches, furniture, and other goods will cease (the market will switch to light, strong types of plastic), and paper factories will eventually close down. For future generations, paper books will likely become the property of wealthy collectors and aesthetes, but the printed page will always be accessible in public buildings known as libraries, which will regain popularity. The rarity of real books will be compensated by the cleaner air breathed by our children and grandchildren.