Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, provide light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal, and natural gas. However, burning fossil fuels causes pollution. In addition, if we don't find new kinds of energy, we will use up all of the fossil fuels in the 21th century. Scientists are working to find other kinds of energy for the future. What might these sources of energy be?

Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, provide light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal, and natural gas. However, burning fossil fuels causes pollution. In addition, if we don't find new kinds of energy, we will use up all of the fossil fuels in the 21th century. Scientists are working to find other kinds of energy for the future. What might these sources of energy be?

Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, provide light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal, and natural gas. However, burning fossil fuels causes pollution. In addition, if we don't find new kinds of energy, we will use up all of the fossil fuels in the 21th century. Scientists are working to find other kinds of energy for the future. What might these sources of energy be?

Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, provide light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal, and natural gas. However, burning fossil fuels causes pollution. In addition, if we don't find new kinds of energy, we will use up all of the fossil fuels in the 21th century. Scientists are working to find other kinds of energy for the future. What might these sources of energy be?

Many people still believe that natural resources will never be used up. Actually, the world's energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible.

Many people still believe that natural resources will never be used up. Actually, the world's energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible.

Many people still believe that natural resources will never be used up. Actually, the world's energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible.

Many people still believe that natural resources will never be used up. Actually, the world's energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible.

Many people still believe that natural resources will never be used up. Actually, the world's energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible.