1 . Our carbon footprint is the estimated amount of carbon dioxide (CO2) given off as we go about our daily lives. While the global average carbon footprint is about 4 tons per person each year, Americans contribute approximately 20 tons of greenhouse gas per person each year. Compared to other countries, even those who use the least amount of energy in the US still contribute double the carbon emissions than the global average per person. And, not surprisingly, a person’s carbon footprint increases in size as his or her income increases.
How is it possible that people in the US who live simple lifestyles, e.g., children or the homeless, make such large contributions to greenhouse gas emissions? The answer is simple: Each US citizen has access to various basic government services such as firefighting and police departments, road and bridge repair, libraries, jails and prisons, the military, etc. When these public services are divided equally among the entire US population, it significantly raises the carbon footprint per person. In fact, according to a study conducted by the Massachusetts Institute of Technology, the lowest carbon footprint that can be calculated for a person living in the US is 8.5 tons. And shockingly, this carbon footprint corresponds to a homeless person who sleeps in public shelters and eats in soup kitchens.
While it is admirable to make changes in lifestyle to reduce a carbon footprint, in reality, it is very difficult to do. The MIT study revealed that a “rebound effect” occurred when someone made an effort to reduce his or her carbon footprint. Take the example of a person who made the deliberate choice to buy a hybrid car instead of a large SUV to save money on gas costs. Very often that person would use the money he or she saved to do something else, e.g., take a long airplane trip. In this case, just one long airplane trip produces more CO2 emissions than driving the large SUV for a year. This ends up having a negative impact on a person’s carbon footprint by making it bigger!
Can Americans reduce their carbon footprints? According to the study, it is possible, but it would require lifestyle changes such as giving up long-distance travel and buying fewer smartphones, tablets, and MP3 players that have large energy costs to produce and deliver. Another way to lower the average Americans US carbon footprint is to add a CO2 tax on food, housing, and transportation, and most Americans don’t want their taxes raised. Unless we can find a way to reduce our carbon footprints, the price we may ultimately have to pay is much higher than the amount Americans will ever have to pay in taxes.
1. The first two paragraphs are intended to____.A.show why people in the US should live simple lifestyles |
B.argue against the world’s misinterpretation of US lifestyles |
C.reveal how big the carbon footprints of people in the US are |
D.stress the impact of carbon footprints on American peoples life |
A.Mary ate a large meal after she had been on diet for a week |
B.Tom bought a hybrid car because it saved him a lot of money |
C.Susan gave up long airplane trips to do her bit for the environment. |
D.David had a good knowledge of what harm CO2 emissions would do. |
A.Investment in basic government services should be reduced. |
B.A homeless person’s carbon footprint is not easy to calculate. |
C.The less a person spends, the more environmentally friendly he is. |
D.A CO2 tax has already been added on food, housing and transportation. |
A.How Can We Change Our Lifestyles? |
B.Can We Make Our Footprints Smaller? |
C.Why Are Our Carbon Footprints Important? |
D.What Makes Contributions to Green house Gas Emissions? |
Light the Cities of the Future
A previously unlit cycle path in the Netherlands has recently drawn our attention. It has been resurfaced with a material that consists of thousands of shining stones in order to create a well-lit route. The Van Gogh Path, so called after the artist who lived in the town of Nuenen in 1883, combines the traditional with the contemporary in a gesture that acknowledge ledges Van Gingh’ masterpiece The Starry Night, but also shows the way ahead for city lighting. The Van Gogh Path is not a single case; it is not difficult to foresee a time when natural materials could help light the cities of the future.
Why should we care about city lighting? What’s wrong with current electrical city lighting anyway? Well, the problem that it causes is two-fold. First, of course, electrical lighting in most cities comes from non-renewable resources. According to the International Energy Agency, almost 20% of global electricity is consumed for lighting, which is responsible for high levels of carbon emissions. But there’s also the belief that electrical light itself is a form of pollution by destroying our view of the night sky.
From the above reasons, then, it seems wise to investigate other approaches. The city of Glasgow is attempting to use intelligent street lighting to monitor how citizens interact with the urban landscape and minimize electrical consumption and thus emissions. This “Smart City approach” is seen by many as the way of the future, but some designers aren’t convinced. They are pioneering the altogether more original approach of using materials from the natural world in order to replace electrical light entirely. They believe that this new “technology” can one day completely replace microchips and digital systems as we find better ways of making use of the light-producing mechanisms (制) that already exist in the natural world.
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________A. applied B. impurity C. embraced D. commercial E. Mixed F. promises G. imposed H. demonstration I. employs J. giant K. version |
How to get all of the toothpaste out of the tube haunts many a bathroom. Bus not, perhaps, for much longer. Colgate-Palmolive, an American consumer-goods
In 2012, two inventors set up a company called LiquiGlide to commercialise their work on making liquids flow easily through pipes and out of containers. What caught many people’s imaginations at the time was a(n)
So far, ketchup-makers have not
LiquiGlidc’s deal with Colgate is, though, the firm’s first big break into a consumer business. The new toothnastc called Elixu, comes in three varicties: a formula tor whitening teeth, one for gum and enamel care and a “detox”
To produce the slippery pipes and containers, a pattern is first
Besides pleasing customers who like to get their money’s worth, the new, slippery toothpaste tubes should help with recycling. Existing tubes are rarely recycled, not only because they have residue left inside them but also because they are usually made from a laminate of plastic and aluminum foil.
A.They support human lives. |
B.They cure human discases. |
C.They estimate species. |
D.They stop plant extinction. |
A.Polluting the environment. |
B.Destroying wildlife habitat. |
C.Organizing activities. |
D.Introducing new species. |
A.To analyze the main causes of the disappearing of some wild animals. |
B.To appeal to people to protect wildlife. |
C.To emphasize the importance of the earth. |
D.To describe different ways to stop pollution. |
A. allowing B. detectable C. hazard D. irresponsible E. linked F. optimism G. punishing H. routes I. sowed J. unavoidable K. widespread |
Time for a clean-up
You are probably aware of the term “forever chemicals”, if not entirely clear on the specifics. What they are is a class of around 16, 000 artificial compounds called PFAS that break down very slowly, if at all in the environment and our bodies. They are extremely useful, but also a potential
A growing body of research has
How did we let it come to this? To some extent, society is reaping what it
6月 5 日世界环境日 International Environment Day将至, 你所在的班级准备以此为契机筹划一次班级主题活动,你积极参与筹划并设计了一个活动方案,请你在全班同学面前介绍你的方案。介绍包括以下两个方面:
1、简述你活动方案的主题和内容。
2、谈谈你设计该活动方案的理由。
(文中不能涉及真实信息)
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
A. locals B decrease C. experienced D.positive E.popularity F.efficiently G. focus H. increase I. respectful J. protect K.fiercely |
Eco-tourism involves people travelling to beautiful but environmental sensitive place. Such trips are usually carried out with a(n)
It is obvious that eco-tourism is beneficial in many aspects. First, all the money spent by the tourists is used to
Compared to normal tourists, eco-tourist use energy more
Two things are needed to make eco-tourism a success. First, it should be done in small groups. And second, because it requires great effort, both eco-tourists and
A. conclusive B. indiscriminate C. awe D. favourable E. uninhabitable F. address G. advocating H. agenda I. attain J. conventional K. odds |
The world has warmed more than one degree Celsius since the Industrial Revolution. The Paris climate agreement hoped to restrict warming to two degrees. The
In the decade that ran from 1979 to 1989, we had an excellent opportunity to solve the climate crisis. The world’s major powers came within several signatures of
Nearly everything we understand now about global warming was understood in 1979. Human beings have altered Earth’s atmosphere through the
But they failed, even though the world’s leading oceanographer Henry Stommel and the Harvard planetary physicist Richard Goody, whose mere presence could inspire
9 . The East African country of Kenya has been at the forefront of the global war on plastic since 2017, when officials banned plastic bags. In June 2020, the government intensified the efforts with a ban on single-use plastics in protected areas. Unfortunately, the measures have
The material engineer’s search to find a(n)
She says, “I wanted to use my education in applied physics and material engineering to do something about the problem of plastic waste pollution. But I was very
Her company, Gjenge Makers, now hires 112 people and produces over 1,500 bricks a day. The pavers (铺路材料) are made using a mix of plastic products that cannot be reprocessed or recycled. The polymer is obtained
The collected plastic is
Matee, who was recently recognized as one of the Young Champions of the Earth 2020 — the United Nations’ highest environmental
A.barely | B.nearly | C.mildly | D.equally |
A.leaked | B.turned | C.loaded | D.dumped |
A.personal | B.orderly | C.feasible | D.adjustable |
A.remind | B.convince | C.assure | D.direct |
A.clear | B.fair | C.bold | D.mature |
A.enclosing | B.distributing | C.channelling | D.reversing |
A.distantly | B.openly | C.secretly | D.directly |
A.replaced | B.mixed | C.equipped | D.fixed |
A.level | B.grant | C.diploma | D.honour |
A.employment | B.experiment | C.entertainment | D.investment |
10 . Few people knew about online food delivery apps ten years ago, but today, many would find it hard to live without them. In China alone, over 400 million people use such apps.
These services have
However, we must not forget the
There are many advantages of these services, but we need to make sure that we make the right choices
A.No wonder | B.Sooner or later | C.More often than not | D.For better or for worse |
A.in part | B.by far | C.no doubt | D.as well |
A.without | B.considering | C.despite | D.including |
A.consume | B.save | C.take | D.waste |
A.minors | B.majors | C.seniors | D.inferiors |
A.strengths | B.drawbacks | C.significance | D.feedbacks |
A.high | B.full | C.low | D.sufficient |
A.identify | B.modify | C.establish | D.maintain |
A.give way to | B.set foot in | C.have no access to | D.pay little regard to |
A.However | B.Moreover | C.Instead | D.Comparatively |
A.drop | B.shrink | C.balloon | D.double |
A.in the long run | B.on a large scale | C.for our reference | D.at our convenience |
A.eating | B.pollution | C.transportation | D.packaging |
A.online shopping | B.ordering in | C.garbage recycling | D.taking away food |
A.ingredients | B.sauces | C.vegetables | D.groceries |