One stubborn guy really wanted to know, where did all the plants and sent to the path of the robot, programmed for extraction of at least one grain. In the end, due to the lack of trees, people can not breathe. Villain raised in his back yard lots of trees, and began to sell oxygen in cans. The world is going crazy, people will improve their technology, not realizing how they spoil nature, cutting down trees, oblivious to the fact that the level of oxygen in the atmosphere decreases markedly.
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