首页
登录
职称英语
Energy from Natural Gas 1. Much of the world gets its ene
Energy from Natural Gas 1. Much of the world gets its ene
游客
2024-01-04
58
管理
问题
Energy from Natural Gas
1. Much of the world gets its energy from fossil fuel sources, including coal, oil, and natural gas, all of which were created millions of years ago.The process began with dead plant and animal matter that collected and over time was buried deep within the earth. There, exposed to extreme pressure and temperatures, the carbon-based material underwent various chemical and physical changes. Some of it became coal, some oil, and some natural gas, depending on the exact conditions it was subjected to.
2. Natural gas is both invisible and odorless. During the first century of the fossil fuel era, it was disregarded as a worthless byproduct of coal and oil. However, people later discovered that it could also be a useful source of energy, and they set about trying to
realize its potential
. Its use began to grow in the twentieth century and has increased rapidly within the last 40 years. Nowadays, natural gas is employed all over the world to heat homes, generate electricity, power factories, and even fuel vehicles.
3. Because it was created through the same process as other fossil fuels, natural gas can often be retrieved from oil fields, something known as an associated source. Coal beds have similarly been known to yield natural gas. In addition, there are isolated deposits containing only gas that are referred to as non-associated sources. To access a subterranean natural gas pocket, a hole is drilled down into it, just as in oil extraction. However, due to the gas’s lightness, it will rise to the surface on its own instead of having to be pumped out.
4. The compound we know as natural gas is actually a
composite
of several different substances, the primary one being methane gas. Each deposit has a unique makeup, but other common components of natural gas include propane, butane, and sulfur. Borrowing terms used in the description of oil, natural gas with a high sulfur content is called "sour" while that with a low content is referred to as "sweet" Regardless of the exact composition, natural gas must be refined to remove its impurities; when ready for use, it is nearly pure methane.
5. Natural gas offers many advantages as a fuel source, the first and most important being that it is extremely clean burning. While oil and coal both have complex molecular structures, methane’s is simple: one carbon atom surrounded by four atoms of hydrogen. The lack of excess particles translates into fewer waste byproducts during combustion. For example, all fossil fuels produce carbon dioxide when burned, but natural gas releases substantially less carbon dioxide than other fuels. Given the major role of carbon dioxide in the acceleration of global warming,
this
is an important attribute. In addition, natural gas emits far less nitrogen and sulfur, which are key contributors to the smog that pollutes the air in metropolitan areas, as well as acid rain.
6. The benefits of natural gas extend far beyond its cleanliness. Since it contains fewer waste particles, its energy can be acquired with much more efficiency than that of the other fossil fuels, meaning a lower overall cost for the consumer. A Another advantage is that natural gas is transported via underground pipelines instead of by ships and trucks.B Finally, natural gas is relatively plentiful and widespread.C Geologists have identified extensive stores in Canada, the United States, Russia, the Middle East, and Australia, among other locations.D With the world’s oil supplies quickly dwindling, it is becoming more important than ever to utilize alternative energy resources such as natural gas.
7. Of course, no energy resource is perfect, and there are some drawbacks to the use of natural gas. Its low density means that it requires larger tanks for storage than oil and coal do, and it is impossible to pipe it across the oceans. Some people have concerns about its safety as well, since its lack of color and smell can make detecting a leak difficult. However, when both its positive and negative characteristics are weighed, it becomes clear that natural gas is perhaps the best energy resource available today. [br] According to Paragraph 7, one danger of using natural gas is that
选项
A、there is no way to monitor its transfer across oceans.
B、its accidental release is hard to notice.
C、it is hazardous when mixed with coal or oil.
D、large amounts of it must be stored in a single container.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3331792.html
相关试题推荐
Naturalistsandcasualobserversalikehavebeenstruckbythespecialr
[img]2012q1/ct_etoefm_etoeflistz_0438_20121[/img][br]Whatnaturalfeaturesof
"GeothermalEnergy"→Geothermalenergyisnaturalheat
"GeothermalEnergy"→Geothermalenergyisnaturalheat
"GeothermalEnergy"→Geothermalenergyisnaturalheat
"GeothermalEnergy"→Geothermalenergyisnaturalheat
"GeothermalEnergy"→Geothermalenergyisnaturalheat
"GeothermalEnergy"→Geothermalenergyisnaturalheat
AlltheplanetsintheSolarsystemexceptMercuryandVenushavenaturalsatell
Nowreadthepassageaboutnuclearenergy.Youwillhave45secondstoreadthe
随机试题
•Readthetextbelowaboutleadership.•Choosethecorrectwordtofilleachg
Recentlyscientistshavebeen【C1】______andperfectingothersourcesofenerg
WhowasthefirstUSPresidentresignedfromoffice?A、AndrewJohnsonB、GeraldFo
Thefactthatthemanagementistryingtoreachagreement______fiveseparateu
青年女性,左小腿被车轮轧伤,患肢明显肿胀,X线片示,左胫骨中段骨折,行石膏托外固
竣工验收合格即办理移交。移交表示()。A、发包人认可并接收工程,承包人工程施工任
Thechangeinthatvillagewasmiraculou
社区矫正机构发现社区矫正对象正在实施违反监督管理规定的行为或者违反人民法院禁止令
A.齐多夫定 B.依非韦伦 C.利托那韦 D.利巴韦林 E.雷特格韦整合
下列属于应列入海关统计的货物有()。 A.以易货贸易方式进出口的货物 B.
最新回复
(
0
)