fuel electricity generation. When you examine the air pollution and emissions from fossil fuels, coal emits about two to three times as much as natural gas per unit of energy produced. The lower the quality of the coal burned, the more pollutants and carbon that is emitted into the ...
oil, and natural gas. This is the energy that is used to heat and provide electricity to homes and businesses and to run cars and factories. Unfortunately, fossil fuels are a nonrenewable resource and waiting millions of years for new coal, oil, and ...
7. The topic of this passage is ___. 标题选择题则是让考生给所读的文章选择一个合适的标题。通常标题由一个名词或名词短语充当,用词简短、精练。常见的提问方式有: 1. What would be the best title for the text? 2. Which of the following is the best / most suitable title for this text?
Natural gas is a commonly used clean fossil fuel. It consists of methane, ethane, propane and butane. Sulfur is a major content in natural gas which leads to the formation of sulfur dioxide and sulfur trioxide. Natural gas is commonly residential and commercial purposes. It can also be used...
环境问题分为两种，一种是传统意义的环境问题，这主要是指在工业革命以前人们对自然资源的不合理开发、利用所导致的环境破坏和资源浪费，即由于过分开垦荒地，滥伐林木、过度放牧，掠夺捕捞等而引起的水土流失、土地沙化、草原退化、水生生物资源日益减少，旱涝灾害频繁等等。例如，“美索不达米亚、希腊、...
Graphite is a conductive material often used in the electrodes of batteries. The battery's efficiency is due to its graphite electrodes. 7 Carbon Carbon compounds are abundant in nature, forming coal, petroleum, and natural gases. Fossil fuels are rich in carbon deposits. 1 Graphite Graphite is...
Types of Fossils Fossils are classified on the basis of how they form. Lots of fossils originate from bones, shells or teeth that have been converted into stone through a process known as petrification. To extensively understand their formation, here is an outline of the different types of fo...
What is the ultimate source of energy for fossil fuels, dams, windmills? What is the ultimate source of energy in coal, oil, and wood? What is the source of energy in the sunshine? What are non-renewable energy sources? What are some examples of the sources of energy?
Learn the combustion reaction definition and what happens in a combustion reaction. Understand the combustion reaction equation and examples of combustion in everyday life. Related to this Question What substance is always a reactant in a combustion reaction?
the troposphere (the bad ozone mentioned above). Human activities that add nitrogen oxides and volatile organic compounds to that atmosphere, such as the fossil fuel burning associated with power-generating plants and vehicular exhaust, are contributing to the formation of larger amounts of ozone nea...