But by covering the Land with concrete we paralyze this function, and it dies. Dead land (concrete) will not grow plants or absorb water, or give it forth in dry times. And contaminants on concrete just stink without being purified; if we don't clean up the mess we cannot even live there. The functions of the earth -- giving life to the plants and animals, regulating the rainwater, purifying waste and returning it to the soil -- may be said to form the main artery of Nature's cyclical function. If the earth is blocked off, the flow of blood will halt, and the Earth will turn into a dead planet. And it is none other than concrete that is responsible for cutting off the flow of blood. The big city is a great mass of concrete, and it is here that the rape of the Land attains its highest perfection. Should the multitudes of buildings collapse, how would they dispose of the mountains of rubble? No matter where they put the rubble, it will cover the earth, and the bottom of the ocean should also be considered earth. Whether a factory, an office building, or a paved road, once it is built we have condemned some part of the Land to be covered with it. The more you block off the Land, the more the functions of nature are necessarily impaired, and we will pay for this sooner or later. The net of Heaven is coarse, but allows nothing to escape [4] -- is it possible that Nature will miss this or generously overlook it? Evil Four The fourth evil is the theft of the farm population. The cities have burgeoned by stealing the farm population. The expansion of the cities is in other words the growth of those employed by the secondary and tertiary industries, and the growth of the secondary and tertiary population represents the decline of the farming population. In order to feed a large non-tilling population with a small farming population, labor-saving, high-yield agriculture is an absolute necessity, and this leads to plundering, contaminating agriculture using machines that run on petroleum. As long as the increased secondary and tertiary population tries to enjoy a modern lifestyle (convenience, extravagance, and ease), it only stands to reason that the consumers (the non-tilling population) will have to put up with, and pay the price of, contaminated agricultural produce. Evil Five