1. The rise of modern civilization would have been impossible without the discovery of vast resources of energy and the developments of ways to transform it into useful forms. All that we do requires energy. The more energy we have at our command, the better we can satisfy our desires for food, clothing, shelter, warmth, transport, communication, and manufactured goods.
The rise of modern civilization is indispensable for those who have been converted into viable products in various ways. The invention and development of vast forms of energy that were harnessed. The greater our demand for energy, the better we can meet our needs for food, clothing, housing, heating, transportation and various commodities.
2. Unfortunately the most convenient fuels – oil and natural gas – are now expensive and their current abundant supply cannot last very long. Alternative fuels all have serious handicaps of one kind or another and nuclear fusion, the ultimate energy source remains a technology of the future.
Unfortunately, the most convenient fuels, oil and natural gas, are now expensive and the current abundant supply cannot be maintained for too long. Various alternative energy sources have their shortcomings, and nuclear energy, the so-called ultimate energy source, also awaits the development of future technology.
3. Our earliest ancestors had only food as their energy source and used energy at an average rate of around 90W per person. The mastery of fire and the harnessing of animal power brought this figure to up to perhaps 0.5 kw, where it remains for many people even now. For more than half the people of the world, the energy consumption today is less than 1 kw per person. However, in the United States the average is 11 kw per person and energy production involves one-third of its industrial plants.
Our oldest ancestors could only use food as their source of physical energy, and the average physical and energy used by each person was about 90 watts of power. The power figure brought by mastering the use of fire and harnessing animal power may be in the range of 500 watts (ie, 0.5 kilowatts), and many people still use this method to this day. More than half of the human population in the world currently consumes less than one watt of energy per person. However, in the United States, an average of 11 watts of energy are used per person, and one-third of this is used in industrial factories.
The above is a personal translation, please read carefully.