信息匹配。
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项。
Many solutions we seek with regard to achieving sustainability(可持续性) are within our reach.
That"s the lesson our school"s Environment Club has learned over the past two years. We"ve reduced
the amount of our waste at our school by 25 per cent. 1 We have the evidence we need to
suggest we are making a difference. If you are interested in leading your school on a similar journey
of change, here are some tips.
2
Examine the garbage can to find out how much of your school"s garbage could be picked out from
the waste stream and be reused. We found that more than 80 percent of our waste could have been
reused, recycled or composted(制成堆肥).
Prepare dustbins there.
3 You will find you can cover the cost of the purchase of the dustbins within a few months simply
by selling the bottles and other items you collect.
Compost the waste.
Start a composting system in your school. You may reduce your waste by as much as 50 percent.
Be sure to talk with your teachers and your cafeteria staff to get them onside.
Share your success.
Let your community know what you"ve accomplished. 4 Ask your teachers if you can talk to
their classes, let your parent group know what you"re doing, and present a report to the president of
your school.
5
Whether you spend a few moments in a quiet place or the whole day walking along a beautiful beach,
time outdoors will remind you why the work you do for the environment is so worthwhile.
A. Dig in.
B. Reward yourself.
C. Do outdoor activities.
D. They"ll feel proud of you.
E. We need to go further, and we will.
F. Invite your friends to join your cause.
G. Make sure every classroom has dustbins for recycling.
We produce 500 billion of plastic bags in a year world-wide and they are thrown
away polluting oceans, killing wild-life and getting dumped in landfills where they take
up to 1,000 years to decompose. Researchers have been unsuccessfully looking for a
solution.
The 16-year-old Canadian high school student, Daniel Burd, from Waterloo Collegiate
Institute, has discovered a-way to make plastic bags degrade(降解)in as few as 3months,
a finding that won him first prize at the Canada-Wide Science Fair, a $10,000 prize, a
$20,000 scholarship, and a chance to revolutionize a major environmental issue.
Burd"s strategy was simple: Since plastic does eventually degrade, it must be eaten by
microorganisms(微生物). If those microorganisms could be identified, we could put them
to work eating the plastic much faster than under normal conditions.
With this goal in mind, he ground plastic bags into a powder and concocted(调制)a
solution of household chemicals, yeast(酵母)and tap water to encourage microbes growth.
Then he added the plastic powder and let the microbes work their magic for 3 months. Finally,
he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead
bacteria as a control. Sure enough, the plastic exposed(暴露)to the live bacteria was 17%
lighter than the control after six weeks.
The inputs are cheap: maintaining the required temperature takes little energy because microbes
produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.
"Almost every week I have to do chores and when I open the closet door, I have piles of plastic
bags falling on top of me. One day, I got tired of it and I wanted to know what other people are
doing with these plastic bags. The answer: not much. So I decided to do something myself." said
Daniel Burd.
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