Across countries there are many energy resources that serve and provide for human life. Including electric energy, wind energy, water energy, ... but people often use it wastefully. Electrical energy is not natural, we have to build power plants. Electrical energy is not an inexhaustible source of energy. Wind energy is often run by electricity or by a mechanical object, we humans often use it to dry clothes, rotate the mill and wind power, ... Finally, water energy flows. Water runoff energy can be used for many things, so people often use it wastefully and costly. To save these energy sources, we should use them economically, not spend as wastefully as possible.
