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Since Stone Age, Metal Age, to Nanotechnology Age, everything is changing. Because technology grows so fast in these centuries, so we have some problems. One is our natural resources decrease extremely, and the other is pollution of the environment . According to resources are decreasing, we need to look for the substitute resources. For example, in Japan, the scientists use the function of ion between hydrogen and oxygen to produce energy, and they let this energy to displace oil and electric. Although technology let our lives make prefect, we made the pollution of the environment. The air pollution, water pollution , and power pollution . Like now, many countries have so much people, and they need huge power to supply people's livelihood. Therefore, they build nuclear power plants, and they get the purpose, but in the same time they kill the ecological environment. On account of nuclear waste material would pollute environment, so they must deal with it better. In short, technology makes lives better, but pollutes environment in the same time. Because we only have this Earth, if we haven’t handled it well , we wouldn’t have future.