The population of the United States is only 6% of the world's population, but Americans 【21】______ one third of all the energy 【22】______ in the world. This fact alone says that Americans need to use less energy. And because the price of energy had been rising very rapidly 【23】______ the limited supplies of oil in particular, Americans are becoming aware to the need to 【24】______ energy. In California we have a California Energy Commission which has set up in the past five years to 【25】______ plan for our future energy use. We have 【26】______ laws in California to help us conserve energy. First of all, our houses in California have been very 【27】______ of energy in the past. They were not 【28】______ very carefully and so the heat would go out of the house very rapidly. Now we require that the homes have a 【29】______ level of insulation, and so the homes built now are much more 【30】______ . 【31】______ , in transportation 【32】______ a large percentage of oil energy is used, we need to develop more public transportation. In China, of course you have a very good public transportation system. And it is a (n) 【33】______ for the kind of thing we need to develop more in the United States. Automobiles are also becoming more 【34】______ . The smaller automobile with efficient engine can help to conserve a large amount of energy along with planning our 【35】______ more carefully. Many different studies have shown that we could 【36】______ our energy consumption by 【37】______ half or two thirds and still have the 【38】______ quality of life. And many different types of technologies are currently being researched as to 【39】______ they can be built to use 【40】______ energy and still supply the same service. 【21】