and as the world's population increases and the supply of fossil fuels dwindles, it becomes more expensive to extract what fossil fuels remain from their subterranean sources. Moreover, the burning of fossil fu
without pollution,Unlike power sources that use fossil fuels,the only by-products from an operating fuel cell are heat and water.可知利用"fuel cell"发电,没有噪音,效能高,没有污染.所以使用"fuel cell"的汽车比普通汽车好.所以C选项是正确的. ...
Hydrogen energy is an alternative to fossil fuels that may represent a cleaner way to power our world. 3D render of blue colored hydrogen molecules.(7 pages)Fuel has always powered humankind’s technological advances, from the wood-burning fires first used to cook food to the fossil fuels ...
Unlike power sources that use fossil fuels, the only by-products from an operating fuel cell are heat and water. To be more technical about it, a hydrogen atom with its one electron, attempts to pass through a fuel cell membrane(膜) to unite with an oxygen atom. The membrane allows ...
the CO2is released again—but we catch it with technology called carbon capture, and we either use it instead of fossil fuels or put it back into the ground for storage. The net effect is that the plants take the carbon out of the air, and we pu...
Second in popularity among fossil fuels is natural gas. In certain areas, natural gas is almost as abundant as coal and, on average, cost-comparable. Gas weighs less than other fossil fuels and often is easier and less expensive to transport. In emergency situations, the flow of natural gas...
Environmental discourses typically represent biofuels as a sustainable and clean source of energy vis-脿-vis prevalent fossil fuels. Biofuels are also portrayed as panacea to multiple challenges, viz. climate change mitigation, international trade deficit, energy crisis, unemployment and rural development...
Their iron-rich excrement creates the perfect growing conditions for phytoplankton(浮游植物). These creatures may be microscopic, but, taken together, they have a great influence on the planet's atmosphere, absorbing about40% of all CO2 produced, four times the amount absorbed by the Amazon...
根据前文 “Their iron-rich excrement creates the perfect growing conditions for phytoplankton.(它 们富含铁的排泄物为浮游植物创造了完美的生长条件)”可知,划线词所在句中的主语These creatures指的 是浮游植物,再根据后文 “but, taken together, they have a great influence on the planet's atmosph...
Fossil Fuels – How They are Made & What is Happening to Them? Posted inShort Notes Fossil fuels are a hugely important source of power and have increasingly been so since the Industrial Revolution. They include coal, gas and petrol. They fuel most of the world’s electricity generating stat...